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Choose the best answer from A, B, C or D.1. Time is short, and the secretaries are typing………..A. with a pressure                   B. under pressure                    C. under the pressure              D. to pressure2. I came............... a reference to Makonde carving when I was an artist.A. across                                 B. into                                     C. over                                    D. for 3. He’s a .................. drinker and can nearly always be found...
Đọc tiếp

Choose the best answer from A, B, C or D.

1. Time is short, and the secretaries are typing………..

A. with a pressure                   B. under pressure                    C. under the pressure              D. to pressure

2. I came............... a reference to Makonde carving when I was an artist.

A. across                                 B. into                                     C. over                                    D. for

 

3. He’s a .................. drinker and can nearly always be found in the hotel bar.

A. full                                      B. strong                                 C. high                                    D. heavy

4. I don’t like the wine. It.............. so sweet.

A. tastes                                  B. looks                                  C. sounds                                D. feels

5. The younger…….......is more interested in fashion than we were

A.  people                                B. group                                  C. population                          D. generation

6. She................. for a neighbor to look after the house while she was away.

A. arranged                            B. organized                            C. planned                               D. gained

7. His…………….. of the aero plane was correct in every detail and could really fly.

A. shape                                 B. model                                 C. design                                 D. pattern

8. We believe that these animals could be saved if our plan were...................

A. taken up                              B. adopted                              C. practiced                             D. carried

4
27 tháng 2 2022

Choose the best answer from A, B, C or D.

1. Time is short, and the secretaries are typing………..

A. with a pressure                   B. under pressure                    C. under the pressure              D. to pressure

2. I came............... a reference to Makonde carving when I was an artist.

A. across                                 B. into                                     C. over                                    D. for

 

3. He’s a .................. drinker and can nearly always be found in the hotel bar.

A. full                                      B. strong                                 C. high                                    D. heavy

4. I don’t like the wine. It.............. so sweet.

A. tastes                                  B. looks                                  C. sounds                                D. feels

5. The younger…….......is more interested in fashion than we were

A.  people                                B. group                                  C. population                          D. generation

6. She................. for a neighbor to look after the house while she was away.

A. arranged                            B. organized                            C. planned                               D. gained

7. His…………….. of the aero plane was correct in every detail and could really fly.

A. shape                                 B. model                                 C. design                                 D. pattern

8. We believe that these animals could be saved if our plan were...................

A. taken up                              B. adopted                              C. practiced                       

27 tháng 2 2022

1. Time is short, and the secretaries are typing………..

A. with a pressure                   B. under pressure                    C. under the pressure              D. to pressure

2. I came............... a reference to Makonde carving when I was an artist.

A. across                                 B. into                                     C. over                                    D. for

 

3. He’s a .................. drinker and can nearly always be found in the hotel bar.

A. full                                      B. strong                                 C. high                                    D. heavy

4. I don’t like the wine. It.............. so sweet.

A. tastes                                  B. looks                                  C. sounds                                D. feels

5. The younger…….......is more interested in fashion than we were

A.  people                                B. group                                  C. population                          D. generation

6. She................. for a neighbor to look after the house while she was away.

A. arranged                            B. organized                            C. planned                               D. gained

7. His…………….. of the aero plane was correct in every detail and could really fly.

A. shape                                 B. model                                 C. design                                 D. pattern

8. We believe that these animals could be saved if our plan were...................

A. taken up                              B. adopted                              C. practiced                             D. carried

Choose the best answer from A, B, C or D.1. Time is short, and the secretaries are typing………..A. with a pressure                   B. under pressure                    C. under the pressure              D. to pressure2. I came............... a reference to Makonde carving when I was an artist.A. across                                 B. into                                     C. over                                    D. for 3. He’s a .................. drinker and can nearly always be found...
Đọc tiếp

Choose the best answer from A, B, C or D.

1. Time is short, and the secretaries are typing………..

A. with a pressure                   B. under pressure                    C. under the pressure              D. to pressure

2. I came............... a reference to Makonde carving when I was an artist.

A. across                                 B. into                                     C. over                                    D. for

 

3. He’s a .................. drinker and can nearly always be found in the hotel bar.

A. full                                      B. strong                                 C. high                                    D. heavy

4. I don’t like the wine. It.............. so sweet.

A. tastes                                  B. looks                                  C. sounds                                D. feels

5. The younger…….......is more interested in fashion than we were

A.  people                                B. group                                  C. population                          D. generation

6. She................. for a neighbor to look after the house while she was away.

A. arranged                            B. organized                            C. planned                               D. gained

7. His…………….. of the aero plane was correct in every detail and could really fly.

A. shape                                 B. model                                 C. design                                 D. pattern

8. We believe that these animals could be saved if our plan were...................

A. taken up                              B. adopted                              C. practiced                             D. carried

0
13 tháng 4 2018

Đáp án D

Kiến thức về từ trái nghĩa

A. nervousness (n): Tính nóng nảy/ sự bực dọc/ sự bồn chồn

B. emotion (n): Sự xúc động, sự xúc cảm

C. stress (n): Áp lực, sự căng thẳng/ trọng âm

D. relaxation (n): Sự giải lao, sự thư giãn/ sự giãn ra

Dịch nghĩa: Ngày nay học sinh chịu nhiều áp lực vì sự kì vong cao từ cha mẹ và thầy cô của chúng.

27 tháng 9 2017

Đáp án D

Giải thích: pressure (n): áp lực >< relaxation (n): sự thư giãn

Các đáp án còn lại:

A. nervousness (n): sự lo lắng

B. emotion (n): cảm xúc

C. stress (n): sự căng thẳng

Dịch nghĩa: Học sinh ngày nay chịu rất nhiều áp lực do sự mong chờ quá cao của cha mẹ và thầy cô.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.   Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.

  Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for every 10 meters of depth in seawater, so that at 39 meters in seawater a diver is exposed to pressure of about 4 atmospheres. The pressure of the gases being breathed must equal the external pressure applied to the body, otherwise breathing is very difficult. Therefore all of the gases in the air breathed by a scuba diver at 40 meter are present at five times their usual pressure. Nitrogen, which composes 80 percent of the air we breathe, usually causes a balmy feeling of well-being at this pressure. At a depth of 5 atmospheres, nitrogen causes symptoms resembling alcohol intoxication, known as nitrogen narcosis. Nitrogen narcosis apparently results from a direct effect on the brain of the large amounts of nitrogen dissolved in the blood. Deep dives are less dangerous if helium is substituted for nitrogen, because under these pressures helium does not exert a similar narcotic effect.

  As a scuba diver descends, the pressure of nitrogen on the lungs increases. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues The reverse occurs when the diver surfaces, the nitrogen pressure in the lungs falls and the nitrogen diffuses from the tissues into the blood, and from the blood into the lungs. If the return to the surface is too rapid, nitrogen in the tissues and blood cannot diffuse out rapidly enough and nitrogen bubbles are formed. They can cause severe pains, particularly around the joints.

  Another complication may result if the breath is held during ascent. During ascent from a depth of 10 meters, the volume of air in the lungs will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.

  To avoid this event, a diver must ascend slowly, never at a rate exceeding the rise of the exhaled air bubbles, and must exhale during ascent.

What does the passage mainly discuss?

A. How to prepare for a deep dive 

B. The effect of pressure on gases in the human body. 

C. The equipment divers use 

D. The symptoms of nitrogen bubbles in the bloodstream

1
10 tháng 8 2019

Chọn B

Bài đọc chủ yếu thảo luận về vấn đề gì?

A. How to prepare for a deep dive: Cách chuẩn bị cho một chuyến lặn sâu

B. The effects of pressure on gases in the human body: Tác động của áp lực lên không khí trong cơ thể con người.

C. The equipment divers use: Thiết bị mà thợ lặn sử dụng

D. The symptoms of nitrogen bubbles in the bloodstream: Dấu hiệu khi bóng Ni tơ ở trong dòng chảy của máu.

Dẫn chứng: “Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure” (Trong một số trường hợp nhất định, cơ thể con người phải đối phó với các khí ở áp suất khí quyển lớn hơn bình thường)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow. Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.

Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for every 10 meters of depth in seawater, so that at 39 meters in seawater a diver is exposed to pressure of about 4 atmospheres. The pressure of the gases being breathed must equal the external pressure applied to the body, otherwise breathing is very difficult. Therefore all of the gases in the air breathed by a scuba diver at 40 meter are present at five times their usual pressure. Nitrogen, which composes 80 percent of the air we breathe, usually causes a balmy feeling of well-being at this pressure. At a depth of 5 atmospheres, nitrogen causes symptoms resembling alcohol intoxication, known as nitrogen narcosis. Nitrogen narcosis apparently results from a direct effect on the brain of the large amounts of nitrogen dissolved in the blood. Deep dives are less dangerous if helium is substituted for nitrogen, because under these pressures helium does not exert a similar narcotic effect.

As a scuba diver descends, the pressure of nitrogen on the lungs increases. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues The reverse occurs when the diver surfaces, the nitrogen pressure in the lungs falls and the nitrogen diffuses from the tissues into the blood, and from the blood into the lungs. If the return to the surface is too rapid, nitrogen in the tissues and blood cannot diffuse out rapidly enough and nitrogen bubbles are formed. They can cause severe pains, particularly around the joints.

Another complication may result if the breath is held during ascent. During ascent from a depth of 10 meters, the volume of air in the lungs will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.

To avoid this event, a diver must ascend slowly, never at a rate exceeding the rise of the exhaled air bubbles, and must exhale during ascent.

 

What does the passage mainly discuss?

A. How to prepare for a deep dive

B. The effect of pressure on gases in the human body

C. The equipment divers use

D. The symptoms of nitrogen bubbles in the bloodstream

1
30 tháng 6 2017

Đáp án B

Bài đọc chủ yếu thảo luận về vấn đề gì?

A. How to prepare for a deep dive: Cách chuẩn bị cho một chuyến lặn sâu

B. The effects of pressure on gases in the human body: Tác động của áp lực lên không khí trong cơ thể con người.

C. The equipment divers use: Thiết bị mà thợ lặn sử dụng

D. The symptoms of nitrogen bubbles in the bloodstream: Dấu hiệu khi bóng Ni tơ ở trong dòng chảy của máu.

Thông tin ở câu chủ đề của đoạn: “Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure” (Trong một số trường hợp nhất định, cơ thể con người phải đối phó với các khí ở áp suất khí quyển lớn hơn bình thường)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.   Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.

  Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for every 10 meters of depth in seawater, so that at 39 meters in seawater a diver is exposed to pressure of about 4 atmospheres. The pressure of the gases being breathed must equal the external pressure applied to the body, otherwise breathing is very difficult. Therefore all of the gases in the air breathed by a scuba diver at 40 meter are present at five times their usual pressure. Nitrogen, which composes 80 percent of the air we breathe, usually causes a balmy feeling of well-being at this pressure. At a depth of 5 atmospheres, nitrogen causes symptoms resembling alcohol intoxication, known as nitrogen narcosis. Nitrogen narcosis apparently results from a direct effect on the brain of the large amounts of nitrogen dissolved in the blood. Deep dives are less dangerous if helium is substituted for nitrogen, because under these pressures helium does not exert a similar narcotic effect.

  As a scuba diver descends, the pressure of nitrogen on the lungs increases. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues The reverse occurs when the diver surfaces, the nitrogen pressure in the lungs falls and the nitrogen diffuses from the tissues into the blood, and from the blood into the lungs. If the return to the surface is too rapid, nitrogen in the tissues and blood cannot diffuse out rapidly enough and nitrogen bubbles are formed. They can cause severe pains, particularly around the joints.

  Another complication may result if the breath is held during ascent. During ascent from a depth of 10 meters, the volume of air in the lungs will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.

  To avoid this event, a diver must ascend slowly, never at a rate exceeding the rise of the exhaled air bubbles, and must exhale during ascent.

The word “exert” in bold in paragraph 1 is closest in meaning to _________.

A. cause

B. permit

C. change

D. need

1
10 tháng 9 2018

Chọn A

Từ "exert" in đậm ở đoạn 1 gần nghĩa nhất với________.

A. gây ra

B. cho phép

C. thay đổi

D. cần

exert (v) = cause (v): gây

Dịch câu: Những thợ lặn sâu thường ít nguy hiểm hơn nếu khi Heli được thay thế cho khí Nitơ, bởi vì dưới áp lực, khí heli không gây ra tác dụng gây mê tương tự.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow. Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.

Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for every 10 meters of depth in seawater, so that at 39 meters in seawater a diver is exposed to pressure of about 4 atmospheres. The pressure of the gases being breathed must equal the external pressure applied to the body, otherwise breathing is very difficult. Therefore all of the gases in the air breathed by a scuba diver at 40 meter are present at five times their usual pressure. Nitrogen, which composes 80 percent of the air we breathe, usually causes a balmy feeling of well-being at this pressure. At a depth of 5 atmospheres, nitrogen causes symptoms resembling alcohol intoxication, known as nitrogen narcosis. Nitrogen narcosis apparently results from a direct effect on the brain of the large amounts of nitrogen dissolved in the blood. Deep dives are less dangerous if helium is substituted for nitrogen, because under these pressures helium does not exert a similar narcotic effect.

As a scuba diver descends, the pressure of nitrogen on the lungs increases. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues The reverse occurs when the diver surfaces, the nitrogen pressure in the lungs falls and the nitrogen diffuses from the tissues into the blood, and from the blood into the lungs. If the return to the surface is too rapid, nitrogen in the tissues and blood cannot diffuse out rapidly enough and nitrogen bubbles are formed. They can cause severe pains, particularly around the joints.

Another complication may result if the breath is held during ascent. During ascent from a depth of 10 meters, the volume of air in the lungs will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.

To avoid this event, a diver must ascend slowly, never at a rate exceeding the rise of the exhaled air bubbles, and must exhale during ascent.

 

The word “exert” in bold in paragraph 1 is closest in meaning to ________.

A. cause 

B. permit 

C. change 

D. need 

1
25 tháng 3 2018

Đáp án A

Từ "exert" in đậm ở đoạn 1 gần nghĩa nhất với________.

A. gây ra

B. cho phép

C. thay đổi

D. cần

exert (v) = cause (v) : gây

Dịch nghĩa : Những thợ lặn sâu thường ít nguy hiểm hơn nếu khi Heli được thay thế cho khí Nitơ, bởi vì dưới áp lực, khí heli không gây ra tác dụng gây mê tương tự.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow. Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.

Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for every 10 meters of depth in seawater, so that at 39 meters in seawater a diver is exposed to pressure of about 4 atmospheres. The pressure of the gases being breathed must equal the external pressure applied to the body, otherwise breathing is very difficult. Therefore all of the gases in the air breathed by a scuba diver at 40 meter are present at five times their usual pressure. Nitrogen, which composes 80 percent of the air we breathe, usually causes a balmy feeling of well-being at this pressure. At a depth of 5 atmospheres, nitrogen causes symptoms resembling alcohol intoxication, known as nitrogen narcosis. Nitrogen narcosis apparently results from a direct effect on the brain of the large amounts of nitrogen dissolved in the blood. Deep dives are less dangerous if helium is substituted for nitrogen, because under these pressures helium does not exert a similar narcotic effect.

As a scuba diver descends, the pressure of nitrogen on the lungs increases. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues The reverse occurs when the diver surfaces, the nitrogen pressure in the lungs falls and the nitrogen diffuses from the tissues into the blood, and from the blood into the lungs. If the return to the surface is too rapid, nitrogen in the tissues and blood cannot diffuse out rapidly enough and nitrogen bubbles are formed. They can cause severe pains, particularly around the joints.

Another complication may result if the breath is held during ascent. During ascent from a depth of 10 meters, the volume of air in the lungs will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.

To avoid this event, a diver must ascend slowly, never at a rate exceeding the rise of the exhaled air bubbles, and must exhale during ascent.

 

It can be inferred from the passage that which of the following presents the greatest danger to a diver?

A. Pressurized helium 

B. Nitrogen diffusion 

C. An air embolism 

D. Nitrogen bubbles 

1
13 tháng 6 2018

Đáp án C

Có thể suy ra từ bài đọc rằng điều gì là mối nguy hiểm lớn nhất đối với thợ lặn?

A. Pressurized helium: Khí Heli nén

B. Nitrogen diffusion: Sự khuếch tán khí Nitơ

C. An air embolism: Sự thuyên tắc hơi

D.Nitrogen bubbles: Bóng khí Nitơ

Thông tin ở đoạn cuối, dòng thứ nhất. “During ascent from a depth of 10 meters, the volume of air in the lung will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.” (Trong quá trình nồi lên từ độ sâu 10 mét, lượng không khí trong phổi sẽ tăng lên gấp đôi vì áp lực khí tại bề mặt nước chỉ còn 1 nửa so với ở độ sâu 10 mét. Sự thay đổi về lượng khí có thể làm phổi sưng phồng, thậm chí là vỡ nát. Hiện tượng này gọi là thuyên tắc hơi.) 

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.   Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions that follow.

  Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a drive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper. The pressure exerted on the human body increases by 1 atmosphere for every 10 meters of depth in seawater, so that at 39 meters in seawater a diver is exposed to pressure of about 4 atmospheres. The pressure of the gases being breathed must equal the external pressure applied to the body, otherwise breathing is very difficult. Therefore all of the gases in the air breathed by a scuba diver at 40 meter are present at five times their usual pressure. Nitrogen, which composes 80 percent of the air we breathe, usually causes a balmy feeling of well-being at this pressure. At a depth of 5 atmospheres, nitrogen causes symptoms resembling alcohol intoxication, known as nitrogen narcosis. Nitrogen narcosis apparently results from a direct effect on the brain of the large amounts of nitrogen dissolved in the blood. Deep dives are less dangerous if helium is substituted for nitrogen, because under these pressures helium does not exert a similar narcotic effect.

  As a scuba diver descends, the pressure of nitrogen on the lungs increases. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues The reverse occurs when the diver surfaces, the nitrogen pressure in the lungs falls and the nitrogen diffuses from the tissues into the blood, and from the blood into the lungs. If the return to the surface is too rapid, nitrogen in the tissues and blood cannot diffuse out rapidly enough and nitrogen bubbles are formed. They can cause severe pains, particularly around the joints.

  Another complication may result if the breath is held during ascent. During ascent from a depth of 10 meters, the volume of air in the lungs will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.

  To avoid this event, a diver must ascend slowly, never at a rate exceeding the rise of the exhaled air bubbles, and must exhale during ascent.

It can be inferred from the passage that which of the following presents the greatest danger to a diver?

A. Pressurized helium

B. Nitrogen diffusion

C. An air embolism

D. Nitrogen bubbles

1
6 tháng 4 2017

Chọn C

Có thể suy ra từ bài đọc rằng điều gì là mối nguy hiểm lớn nhất đối với thợ lặn?

A. Pressurized helium: Khí Heli nén

B. Nitrogen diffusion: Sự khuếch tán khí Nitơ

C. An air embolism: Sự thuyên tắc hơi

D. Nitrogen bubbles: Bóng khí Nitơ

Thông tin ở đoạn cuối, dòng thứ nhất. “During ascent from a depth of 10 meters, the volume of air in the lung will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism.” (Trong quá trình nồi lên từ độ sâu 10 mét, lượng không khí trong phổi sẽ tăng lên gấp đôi vì áp lực khí tại bề mặt nước chỉ còn 1 nửa so với ở độ sâu 10 mét. Sự thay đổi về lượng khí có thể làm phổi sưng phồng, thậm chí là vỡ nát. Hiện tượng này gọi là thuyên tắc hơi.)