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8 tháng 12 2016

On the supposition that AB<AC

AK be the angle bisector of the triangle

\(\Rightarrow\)  \(\frac{KB}{KC}=\frac{AB}{AC}=\frac{2}{3}\)

\(\Rightarrow\frac{MB-MK}{MC+MK}=\frac{MC-MK}{MC+MK}=\frac{2}{3}\)

\(\Rightarrow3MC-3MK=2MC+2MK\)

\(\Rightarrow MC=5MK\)

\(\Rightarrow BK=MC-MK=5MK-MK=4MK\)

Let AH be the height of the triangle

\(\Rightarrow\frac{S_{AKM}}{S_{ABK}}=\frac{\frac{AH.KM}{2}}{\frac{BK.AH}{2}}=\frac{KM}{4KM}=\frac{1}{4}\)

If AB > AC then

\(\Rightarrow CM=5MK\)

\(\Rightarrow Bk=CM+MK=5MK+MK=6MK\)

\(\Rightarrow\frac{S_{AKM}}{S_{AKB}}=\frac{\frac{AH.MK}{2}}{\frac{AH.BK}{2}}=\frac{MK}{6MK}=\frac{1}{6}\)

Read the passage, and choose the correct answer A, B, C or D for each question.In the old days, Vietnamese roads were seen with bicycles and a few trucks. Now they are full of a variety of vehicles. The Vietnamese carry a huge load of a variety of goods up to over one hundred kilograms, especially during the war.Time has gone by and fewer bikes are visible in the street. In big cities, many people think that bicycles belong to the inferior classes and seem unfashionable. That is why people...
Đọc tiếp

Read the passage, and choose the correct answer A, B, C or D for each question.

In the old days, Vietnamese roads were seen with bicycles and a few trucks. Now they are full of a variety of vehicles. The Vietnamese carry a huge load of a variety of goods up to over one hundred kilograms, especially during the war.

Time has gone by and fewer bikes are visible in the street. In big cities, many people think that bicycles belong to the inferior classes and seem unfashionable. That is why people often find it hard - psychologically and physically - to park their bikes when going to a modern cafe or shopping malls.

 

Motorbikes are the main mode of transport in Viet Nam, with 24 million of them in a country of 87 million people in 2009, one of the highest ratios in the world. More motorbikes of all brands have dominated the road. The mobility which motorbikes provide is so crucial to workers in big cities. Some youths try to show off with expensive motorbikes of famous brands. Almost anything can be transported on a motorcycle. The loads include baskets of fruits, tree trunks, live pigs, flocks of live ducks and stacked crates of raw eggs. Two thirds of Viet Nam's population of 85 million arc under 30, and the motorcycle has become the center of youth culture.

Nowadays, bicycles ………….

A. become more visible in the streets

B. are looked down on by some people

C. are used in the war

D. can’t be parked outside a modern café

1
17 tháng 12 2019

Đáp án: B

Thông tin: In big cities, many people think that bicycles belong to the inferior classes and seem unfashionable

Dịch: Ở các thành phố lớn, rất nhiều người nghĩ rằng xa đạp thuộc về tầng lớp thứ cấp và có vẻ như không hợp thời trang

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 from 35 to 42. Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed...
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 from 35 to 42.

Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. It is perhaps then, no accident that music should strike such a chord with the limbic system – an ancient part of our brain, evolutionarily speaking, and one that we share with much of the animal kingdom. Some researchers even propose that music came into this world long before the human race ever did. For example, the fact that whale and human music have so much in common even though our evolutionary paths have not intersected for nearly 60 million years suggests that music may predate humans. They assert that rather than being the inventors of music, we are latecomers to the musical scene.

Humpback whale composers employ many of the same tricks that human songwriters do. In addition to using similar rhythms, humpbacks keep musical phrases to a few seconds, creating themes out of several phrases before singing the next one. Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even thoughthey can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. They mix percussive and pure tones in pretty much the same ratios as human composers – and follow their ABA form, in which a theme is presented, elaborated on and then revisited in a slightly modified form. Perhaps most amazing, humpback whale songs include repeating refrains that rhyme. It has been suggested that whales might use rhymes for exactly the same reasons that we do: as devices to help them remember. Whale songs can also be rather catchy. When a few humpbacks from the Indian Ocean strayed into the Pacific, some of the whales they met there quickly changed their tunes – singing the new whales’ songs within three short years. Some scientists are even tempted to speculate that a universal music awaits discovery.

The underlined word sophisticatedin paragraph 1 can be best replaced by________,

A. well-trained

B. difficult

C. well-developed 

D. experienced

1
28 tháng 10 2017

Đáp án C

 Từ gạch dưới "sophisticated" trong đoạn 1 có thể được thay thế bằng ____.

 A. well-trained: được đào tạo kĩ càng

 B. difficult: khó khăn

 C. well-developed: phát triển tốt

 D. experienced: có kinh nghiệm

 sophisticated: phức tạp, tinh vi

 From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones: Từ các khám phá được thực hiện ở Pháp và Slovenia, ngay cả người Neanderthal, cách đây 53.000 năm, cũng đã phát triển những chiếc sáo tinh vi, có âm thanh ngọt ngào được chạm khắc từ xương thú vật.

 “sophisticated” = “well-developed”

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 from 35 to 42. Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed...
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 from 35 to 42.

Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. It is perhaps then, no accident that music should strike such a chord with the limbic system – an ancient part of our brain, evolutionarily speaking, and one that we share with much of the animal kingdom. Some researchers even propose that music came into this world long before the human race ever did. For example, the fact that whale and human music have so much in common even though our evolutionary paths have not intersected for nearly 60 million years suggests that music may predate humans. They assert that rather than being the inventors of music, we are latecomers to the musical scene.

Humpback whale composers employ many of the same tricks that human songwriters do. In addition to using similar rhythms, humpbacks keep musical phrases to a few seconds, creating themes out of several phrases before singing the next one. Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even thoughthey can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. They mix percussive and pure tones in pretty much the same ratios as human composers – and follow their ABA form, in which a theme is presented, elaborated on and then revisited in a slightly modified form. Perhaps most amazing, humpback whale songs include repeating refrains that rhyme. It has been suggested that whales might use rhymes for exactly the same reasons that we do: as devices to help them remember. Whale songs can also be rather catchy. When a few humpbacks from the Indian Ocean strayed into the Pacific, some of the whales they met there quickly changed their tunes – singing the new whales’ songs within three short years. Some scientists are even tempted to speculate that a universal music awaits discovery.

The underlined word refrainsin paragraph 2 is closest in meaning to________

A. sounds

B. notes

C. words

D. tunes

1
23 tháng 10 2019

Đáp án D

Từ được gạch chân “refrains” ở đoạn 2 có nghĩa gần nhất với

A. sounds: âm thanh

B. notes: ghi chú

C. words: từ

D. tunes: giai điệu

refrains: điệp khúc ≈ tunes

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. Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed...
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.

Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. It is perhaps then, no accident that music should strike such a chord with the limbic system – an ancient part of our brain, evolutionarily speaking, and one that we share with much of the animal kingdom. Some researchers even propose that music came into this world long before the human race ever did. For example, the fact that whale and human music have so much in common even though our evolutionary paths have not intersected for nearly 60 million years suggests that music may predate humans. They assert that rather than being the inventors of music, we are latecomers to the musical scene.

Humpback whale composers employ many of the same tricks that human songwriters do. In addition to using similar rhythms, humpbacks keep musical phrases to a few seconds, creating themes out of several phrases before singing the next one. Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even though they can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. They mix percussive and pure tones in pretty much the same ratios as human composers – and follow their ABA form, in which a theme is presented, elaborated on and then revisited in a slightly modified form. Perhaps most amazing, humpback whale songs include repeating refrains that rhyme. It has been suggested that whales might use rhymes for exactly the same reasons that we do: as devices to help them remember. Whale songs can also be rather catchy. When a few humpbacks from the Indian Ocean strayed into the Pacific, some of the whales they met there quickly changed their tunes – singing the new whales’ songs within three short years. Some scientists are even tempted to speculate that a universal music awaits discovery.

 

The underlined word “sophisticatedin paragraph 1 can be best replaced by______.

A. well-trained

B. difficult 

C. well-developed 

D. experienced 

1
6 tháng 5 2019

Đáp án C

Từ gạch dưới "sophisticated" trong đoạn 1 có thể được thay thế bằng ____.

A. well-trained: được đào tạo kĩ càng

B. difficult: khó khăn

C. well-developed: phát triển tốt

D. experienced: có kinh nghiệm

sophisticated: phức tạp, tinh vi

From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. (Từ các khám phá được thực hiện ở Pháp và Slovenia, ngay cả người Neanderthal, cách đây 53.000 năm, cũng đã phát triển những chiếc sáo tinh vi, có âm thanh ngọt ngào được chạm khắc từ xương thú vật)

Ở câu này, thay thế “sophisticated” bằng “ well-developed” là hợp lí nhất

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. Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed...
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.

Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. It is perhaps then, no accident that music should strike such a chord with the limbic system – an ancient part of our brain, evolutionarily speaking, and one that we share with much of the animal kingdom. Some researchers even propose that music came into this world long before the human race ever did. For example, the fact that whale and human music have so much in common even though our evolutionary paths have not intersected for nearly 60 million years suggests that music may predate humans. They assert that rather than being the inventors of music, we are latecomers to the musical scene.

Humpback whale composers employ many of the same tricks that human songwriters do. In addition to using similar rhythms, humpbacks keep musical phrases to a few seconds, creating themes out of several phrases before singing the next one. Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even though they can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. They mix percussive and pure tones in pretty much the same ratios as human composers – and follow their ABA form, in which a theme is presented, elaborated on and then revisited in a slightly modified form. Perhaps most amazing, humpback whale songs include repeating refrains that rhyme. It has been suggested that whales might use rhymes for exactly the same reasons that we do: as devices to help them remember. Whale songs can also be rather catchy. When a few humpbacks from the Indian Ocean strayed into the Pacific, some of the whales they met there quickly changed their tunes – singing the new whales’ songs within three short years. Some scientists are even tempted to speculate that a universal music awaits discovery.

 

The underlined word “they” in paragraph 2 refers to ______. 

A. whole songs

B. whales 

C. octaves 

D. human composers 

1
11 tháng 4 2018

Đáp án B

Từ gạch chân "they" trong đoạn 2 đề cập đến______.

A. bài hát của cá voi

B. cá voi

C. quãng tám

D. nhà soạn nhạc nhân loại.

“They” làm chủ ngữ trong câu do đo sta chú ý đến câu trước đó: “Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even though they can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. “ (Những bài hát của cá voi nói chung không có gì hơn là những phần của bản giao hưởng, có lẽ bởi vì chúng có một khoảng chú ý tương tự. Mặc dù chúng có thể hát trong khoảng 7 quãng tám, nhưng cá voi thường hát theo trọng âm, lan rộng các nốt liền kề xa hơn một âm giai)

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 from 35 to 42. Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed...
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 from 35 to 42.

Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. It is perhaps then, no accident that music should strike such a chord with the limbic system – an ancient part of our brain, evolutionarily speaking, and one that we share with much of the animal kingdom. Some researchers even propose that music came into this world long before the human race ever did. For example, the fact that whale and human music have so much in common even though our evolutionary paths have not intersected for nearly 60 million years suggests that music may predate humans. They assert that rather than being the inventors of music, we are latecomers to the musical scene.

Humpback whale composers employ many of the same tricks that human songwriters do. In addition to using similar rhythms, humpbacks keep musical phrases to a few seconds, creating themes out of several phrases before singing the next one. Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even thoughthey can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. They mix percussive and pure tones in pretty much the same ratios as human composers – and follow their ABA form, in which a theme is presented, elaborated on and then revisited in a slightly modified form. Perhaps most amazing, humpback whale songs include repeating refrains that rhyme. It has been suggested that whales might use rhymes for exactly the same reasons that we do: as devices to help them remember. Whale songs can also be rather catchy. When a few humpbacks from the Indian Ocean strayed into the Pacific, some of the whales they met there quickly changed their tunes – singing the new whales’ songs within three short years. Some scientists are even tempted to speculate that a universal music awaits discovery.

The underlined word theyin paragraph 2 refers to__________.

A. whole songs

B. whales

C. octaves

D. human composers

1
16 tháng 2 2019

Đáp án B

Từ gạch chân "they" trong đoạn 2 đề cập đến______.

A. bài hát của cá voi

B. cá voi

C. quãng tám

D. nhà soạn nhạc nhân loại.

  “They” làm chủ ngữ trong câu do đo sta chú ý đến câu trước đó: “Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even though they can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. “(Những bài hát của cá voi nói chung không có gì hơn là những phần của bản giao hưởng, có lẽ bởi vì chúng có một khoảng chú ý tương tự. Mặc dù chúng có thể hát trong khoảng 7 quãng tám, nhưng cá voi thường hát theo trọng âm, lan rộng các nốt liền kề xa hơn một âm giai)

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. Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed...
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.

Music can bring us to tears or to our feet, drive us into battle or lull us to sleep. Music is indeed remarkable in its power over all humankind, and perhaps for that very reason, no human culture on earth has ever lived without it. From discoveries made in France and Slovenia, even Neanderthal man, as long as 53,000 years ago, had developed surprisingly sophisticated, sweet-sounding flutes carved from animal bones. It is perhaps then, no accident that music should strike such a chord with the limbic system – an ancient part of our brain, evolutionarily speaking, and one that we share with much of the animal kingdom. Some researchers even propose that music came into this world long before the human race ever did. For example, the fact that whale and human music have so much in common even though our evolutionary paths have not intersected for nearly 60 million years suggests that music may predate humans. They assert that rather than being the inventors of music, we are latecomers to the musical scene.

Humpback whale composers employ many of the same tricks that human songwriters do. In addition to using similar rhythms, humpbacks keep musical phrases to a few seconds, creating themes out of several phrases before singing the next one. Whale songs in general are no longer than symphony movements, perhaps because they have a similar attention span. Even though they can sing over a range of seven octaves, the whales typically sing in key, spreading adjacent notes no farther apart than a scale. They mix percussive and pure tones in pretty much the same ratios as human composers – and follow their ABA form, in which a theme is presented, elaborated on and then revisited in a slightly modified form. Perhaps most amazing, humpback whale songs include repeating refrains that rhyme. It has been suggested that whales might use rhymes for exactly the same reasons that we do: as devices to help them remember. Whale songs can also be rather catchy. When a few humpbacks from the Indian Ocean strayed into the Pacific, some of the whales they met there quickly changed their tunes – singing the new whales’ songs within three short years. Some scientists are even tempted to speculate that a universal music awaits discovery.

 

The underlined word “refrains” in paragraph 2 is closest in meaning to _______.

A. sounds

B. notes 

C. words 

D. tunes 

1
20 tháng 9 2018

Đáp án D

Từ được gạch chân “refrains” ở đoạn 2 có nghĩa gần nhất với

A. sounds: âm thanh

B. notes: ghi chú

C. words : từ

D. tunes: giai điệu

refrains: điệp khúc ≈ tunes