K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

27 tháng 8 2021

in which that young scientist is working has a lot of chemicals.

29 tháng 4 2019

33. About thirty million people are watching this program.

This program............is being watched by About thirty million people............................................................

34. You are tired because you often stay up late.

If you.........didn't up late, you wouldn't be tired..............................................................

35. The students are working in a laboratory with a lot of chemicals.

The laboratory.............where the students are working with a lot of chemicals............................................................................

36. The last time I saw him was two days ago.

I haven't.........seen him for two days..................................

25 tháng 3 2020

1. This is the house. The house has a big garden.

This is the house which has a big garden.

2. This is the house. I was born in that house

This is the house in which I was born

3. Our school has a good laboratory. The students practice chemistry in the laboratory.

Our school has a good laboratory in which the students practice chemistry.

4. Our school has a good laboratory. Mr. John designed it in 2000.

Our school has a good labortory which Mr.John designed in 2000.

5. Mekong Delta is located in the South of Viet Nam. It provides most of the rice for exporting.

Mekong Delta which provides most of the rice for exporting, is located in the South of Viet Nam.

14 tháng 5 2017

Combine these sentences , using which , where , when :

1; hà nội is the place . i’d like to come to hà nội

=> hà nội is where i’d like to come to.

2 summer is the time . the weather is very hot then

=> summer is when the weather is very hot then.

3 the bed was comfortable . i slept in it last night

=>the bed which i slept in last night was comfortable.

4 i never forget the park . we met each other for the first time at this park

=> i never forget the park where we met each other for the first time .

5 i do not know the reason . she left school for it

=> i do not know the reason why she left school.

6 we have not decided the day . i will go to london on that day

=> we have not decided the day which i will go to london.

7 our school has a good laboratory . the students practice chemistry in the laboratory

=>our school has a good laboratory where the students practice chemistry

8 our school has a good laboratory. Mr John designed it in

=> our school has a good laboratory where Mr John designed.

9 ) 7 : 30 is the time . my plane will arrive then

=> 7 : 30 is the time when my plane will arrive

10 i love my parent’s house . i was born in that house

=>i love my parent’s house where i was born.

(33-36) Rewrite the sentences so that they are nearest in meaning to the sentence printed before them. 33/ About thirty million people are watching this program. This program _______________________________________________________ 34/ You are tired because you often stay up late.  If you _____________________________________________________________ 35/ The students are working in a laboratory with a lot of chemicals.  The laboratory...
Đọc tiếp

(33-36) Rewrite the sentences so that they are nearest in meaning to the sentence printed before them.

33/ About thirty million people are watching this program.

This program _______________________________________________________

34/ You are tired because you often stay up late.

 If you _____________________________________________________________

35/ The students are working in a laboratory with a lot of chemicals.

 The laboratory ____________________________________________________

36/ The last time I saw him was two days ago.

I haven’t __________________________________________________________

(33-36) Rewrite the sentences so that they are nearest in meaning to the sentence printed before them.

33/ They have painted their house blue and white.

Their house ________________________________________________________

34/ Lan is the best student in our class.

 Nobody ___________________________________________________________

35/ We are studying in a very large classroom now.

 The classroom ______________________________________________________

36/ We haven’t had a party last Christmas

The last time _______________________________________________________

1
7 tháng 9 2019

(33-36) Rewrite the sentences so that they are nearest in meaning to the sentence printed before them.

33/ About thirty million people are watching this program.

This program ____is being watched by About thirty million people ___________________________________________________

34/ You are tired because you often stay up late.

 If you often stay up late,you'll be tired_____________________________________________________________

35/ The students are working in a laboratory with a lot of chemicals.

 The laboratory __where the students are working has a lot of chemicals__________________________________________________

36/ The last time I saw him was two days ago.

I haven’t ____seen him for 2 days______________________________________________________

(33-36) Rewrite the sentences so that they are nearest in meaning to the sentence printed before them.

33/ They have painted their house blue and white.

Their house ____has been painted blue and white____________________________________________________

34/ Lan is the best student in our class.

 Nobody in our class is better than Lan___________________________________________________________

35/ We are studying in a very large classroom now.

 The classroom in which we are studying now s a very large classroom______________________________________________________

36/ We haven’t had a party last Christmas

The last time ____we had a party was in Christmas___________________________________________________

30 tháng 4 2017

cau 1 : combine these sentences , using WHICH , WHERE , WHEN :

1 ha noi is the place . i’d like to come to ha noi

ha noi is the place to which i’d like to come

2 summer is the time . the weather is very hot then

summer is the time when the weather is very hot

3 the bed was comfortable . i slept in it last night

the bed which i slept in last night was comfortable .

4 i never forget the park . we met each other for the first time at this park

i never forget the park where we met each other for the first time

5 i do not know the reason . she left school for it

i do not know the reason for which she left school

6. we have not decided the day . i’ll go to london on that day

we have not decided the day when i’ll go to london

7. our school has a good laboratory . the students practice chemistry in the laboratory

our school has a good laboratory where the students practice chemistry

8. our school has a good laboratory . mr john designed in it

our school has a good laboratory where mr john designed

9. 7:30 is the time . my plane will arrive then

7:30 is the time when my plane will arrive

10 i love my parents’s house . i was born in that house

i love my parents’s house where i was born

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question from 43 to 50.ACID DUST“ Calcite- containing dust particles blow into the air and combine with nitric acid in polluted air from factories to form an entirely new particle – calcium nitrate , ” said Alexander Laskin, a senior research scientist at the Department of Energy’s Pacific Northwest National Laboratory in Richland, Washington .These nitrates...
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 for the question from 43 to 50.

ACID DUST

“ Calcite- containing dust particles blow into the air and combine with nitric acid in polluted air from factories to form an entirely new particle – calcium nitrate , ” said Alexander Laskin, a senior research scientist at the Department of Energy’s Pacific Northwest National Laboratory in Richland, Washington .These nitrates have optical and chemical properties that are completely different from those of the originally dry dust particles . Due to this, climate models need to be updated to reflect this chemistry. Calcite dust is common in arid areas such as Israel, where scientists collected particles for analysis.

 Working from a mountaintop, the team collected dust that had blown in from the northern shores of Egypt, Sinai,and southern Israel. The particles had combined with air containing pollutants that came from Cairo.They analyzed nearly 2,00 individual particles and observed the physical and chemical changes at the W.R Wiley Environmental Sciences Laboratory.

 A key change in the properties of the newly formed nitrate particles is that they begin to absorb water and retain the moisture .These wet particles can scatter and absorb sunlight-presenting climate modelers, who need to know where the energy is going , a new wild card to deal with . Companion studies of dust samples from the Sahara and the Saudi coast and loess from China show that the higher the calcium in the mineral , the more reactive they are in with nitric acid .And once the particle is changed , it stays that way.

 “When dust storms kick up these particles and they enter polluted areas , the particles change ,” Laskin said . “To what extent this is happening globally, as more of the world becomes industrialized , we don’t know . But now we have the laboratory and field evidence that shows it is definitely happening . The story is much more complicated than anybody thought .”

Which of the following may be true ?

A. The change of an ice age is increased

B. We may see more rainbows

C. The greenhouse effects are increased 

D. Calcite dust is common in arid areas

1
31 tháng 12 2018

Đáp án là D

Câu nào sau đây có thể đúng?

A. Sự thay đổi của thời kỳ băng hà được tăng lên.

B. Chúng ta có thể nhìn thấy nhiều cầu vòng hơn.

C. Hiệu ứng nhà kính tăng lên.

D. Bụi canxit thì phổ biến ở các vùng cằn cỏi.

Dẫn chứng: Calcite dust is common in arid areas such as Israel, where scientists collected particles for analysis

30 tháng 5 2018

4. I never forget the park. We met each other for the first time at this park.
I never forget the park where we met each other for the first time

5 I do not know the reason . She left school for it

=> I do not know the reason for which she left school

6. We have not decided the day . I’ll go to london on that day

=>We have not decided the day when I’ll go to london

7. Our school has a good laboratory . The students practice chemistry in the laboratory

=>Our school has a good laboratory where the students practice chemistry

8. Our school has a good laboratory . Mr John designed it in 2000

=>Our school has a good laboratory where Mr John designed it in 2000

9. 7:30 is the time . My plane will arrive then

=>7:30 is the time when my plane will arrive

10 I love my parents’s house . I was born in that house

=>I love my parents’s house where I was born

22.We first met in 1945 . The revolution took place then.

=>We first met in 1945 when the revolution took place

2 tháng 3 2021

sao không làm hết bạn

 

26 tháng 1 2019

1.You are tired because you often stay up late

->If you.....didn't often stay up late, you would not be tired.......

2.The students are working in a laboratory with a lot of chemicals

->The laboratory...where the students are working has a lot of chemicals ....

3.The last time I saw him was two days ago

->I haven't....seen him for 2 days...

4.Remember.....to turn.... off television before going to bed.(turn)

5.I wish it........would stop .... raining now(stop).

6.Are you interested in.writing .. e-mail?(write)

7.When we arrived, she....was feeeding ...... the chickens(feed)

8.Fuel.....consumption..... can be cut down by having fewer cars on the roads(cosume)

9.Don's run too fast if you feel....uncomfortable .... (comfort)

10.Our government should ...modernize.. the system of traffic(modern)

Read the following passage and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each for the question from 43 to 50.ACID DUST“ Calcite- containing dust particles blow into the air and combine with nitric acid in polluted air from factories to form an entirely new particle – calcium nitrate , ” said Alexander Laskin, a senior research scientist at the Department of Energy’s Pacific Northwest National Laboratory in Richland, Washington .These nitrates...
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 for the question from 43 to 50.

ACID DUST

“ Calcite- containing dust particles blow into the air and combine with nitric acid in polluted air from factories to form an entirely new particle – calcium nitrate , ” said Alexander Laskin, a senior research scientist at the Department of Energy’s Pacific Northwest National Laboratory in Richland, Washington .These nitrates have optical and chemical properties that are completely different from those of the originally dry dust particles . Due to this, climate models need to be updated to reflect this chemistry. Calcite dust is common in arid areas such as Israel, where scientists collected particles for analysis.

 Working from a mountaintop, the team collected dust that had blown in from the northern shores of Egypt, Sinai,and southern Israel. The particles had combined with air containing pollutants that came from Cairo.They analyzed nearly 2,00 individual particles and observed the physical and chemical changes at the W.R Wiley Environmental Sciences Laboratory.

 A key change in the properties of the newly formed nitrate particles is that they begin to absorb water and retain the moisture .These wet particles can scatter and absorb sunlight-presenting climate modelers, who need to know where the energy is going , a new wild card to deal with . Companion studies of dust samples from the Sahara and the Saudi coast and loess from China show that the higher the calcium in the mineral , the more reactive they are in with nitric acid .And once the particle is changed , it stays that way.

 “When dust storms kick up these particles and they enter polluted areas , the particles change ,” Laskin said . “To what extent this is happening globally, as more of the world becomes industrialized , we don’t know . But now we have the laboratory and field evidence that shows it is definitely happening . The story is much more complicated than anybody thought .”

What is the main idea of the passage ?

A. There is a new particle called calcium nitrate 

B. Factories are polluting the environment

C. Climate models have to be updated because of the new particle calcium nitrate

D. Calcium nitrate has chemical properties different from other dust particles

1
25 tháng 3 2017

Đáp án là C

Nội dung chính của bài đọc là gì?

A. Có một phân tử mới được gọi là natri nitrat.

B. Các nhà máy đang làm ô nhiễm môi trường.

C. Các mô hình khí hậu phải được cập nhật bởi vì phân tử mới natri nitrat.

D. Natri nitrat có đặc điểm hóa học khác so với các phân tử bụi khác.

Dẫn chứng:

“ Calcite- containing dust particles blow into the air and combine with nitric acid in polluted air from factories to form an entirely new particle – calcium nitrate , ”

These nitrates have optical and chemical properties that are completely different from those of the originally dry dust particles . Due to this, climate models need to be updated to reflect this chemistry