when harvested from the land 90% of turnip consisted of water after being exposed by thhe sun for an hour 10% of the water had evaporated now what the percentage of the turnip consisted of water các anh chi trả lời bằng tiếng nào cũng được nha
Sea water is salty. If the oceans _______of fresh water, there____plenty of water to irrigate all of the deserts in the world
A. consisted/would be
B. consisted/were
C. would consist / could be
D. consist/ will be
Read the passage, then choose the best answer by circling the letter A, B, C or D ( 15p ):
In the very distant geological past, all animals were aquatic. The very first vertebrates or animals with backbones, of which we have any fossil record, lived in water. These vertebrates, the fish, were adapted to underwater living. Their streamlined bodies were covered with scales to reduce surface friction: they had muscular tails so that they could swim swiftly in such a dense medium as water; and they were endowed with gills for breathing underwater.
Descendants of fish-type ancestors crossed the seashore barrier and accommodated themselves to life on land.
As amphibians, they possessed limbs instead of fins and lungs instead of gills. But they never became completely free of the bonds that tied them to the water; even today many amphibians return to the water to lay their eggs.
Millions of years after the first clumsy amphibians crawled over the land, newer types of land dwellers appeared, these animals give rise to the present-day reptiles and mammals. They were completely converted for land dwelling, with bodies and biological activities far different from those of fish. With these special adaptations, mammals have been able to colonize the woods and meadows, the deserts and high mountains, often far removed from the sea.
An example of an amphibian's incomplete adaptation to land life is……………………..
A. Need to keep its skin wet
B. Scales-covered skin
C.Return to water to lay eggs
D. Inability to breathe air
Giải thích: Dựa vào “As amphibians, they possessed limbs instead of fins and lungs instead of gills. But they never became completely free of the bonds that tied them to the water; even today many amphibians return to the water to lay their eggs.”
Đáp án A
A watermelon weighs 2kg and contains 92% of water. After putting in the sun, the water of the watermelon only contains 90% of water. At that time, how many kilograms does that watermelon weigh ?
Lượng nước trong quả dưa hấu: 2 x 92% = 1,84 (kg)
90% lượng nước còn lại: 1,84 x 90% = 1,656 (kg)
Khối lượng quả dưa bị giảm: 1,84 – 1,656 = 0,184 (kg)
Sau khi phơi nắng quả dưa hấu cân nặng: 2 – 0,184 = 1,816 (kg)
Dịch:Một quả dưa hấu nặng 2kg và chứa 92% là nước. Sau khi đem phơi nắng, phần nước của dưa hấu chỉ còn lại 90% là nước. Hỏi khi đó quả dưa hấu đó nặng bao nhiêu ki-lô-gam?
Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42.
The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food. Glaciers are a possible source of fresh water that has been overlooked until recently. (A)
Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica. (B)
Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes; rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. (C)
The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalination, or removing salt from water. (D)
Question 42: What are the technical matters mentioned as the difficulty arising in the process of obtaining fresh water from the iceberg?
A. The prevention of rapid melting iceberg
B. The filtering water and the funneling it to shore in a large amount
C. The purifying the fresh water and carrying it to shore
D. The prevention of rapid melting and the funneling to shore in great volume
Đáp án D
Dịch nghĩa: Vấn đề kĩ thuật nào được nhắc đến như là khó khăn xảy ra trong quá trình lấy nước ngọt từ núi băng?
A. Việc phòng ngừa băng tan chảy nhanh chóng.
B. Lọc nước và chuyển nó vào bờ với một số lượng lớn
C. Lọc nước ngọt và mang nó vào bờ
D. Ngăn ngừa sự tan chảy nhanh và cách chuyển vào bờ với số lượng lớn
Giải thích: Thông tin nằm ở đoạn 4 “The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume”.
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.
Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.
The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.
Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.
Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods.
What can be inferred about Canada’s Bay of Fundy ?
A. It may experience tsunamis because of its extreme tides.
B. It may have a longer tide cycle because of its wide variations
C. It may be very narrow because it has wide tidal variations.
D. It may be influenced more by gravity than other places.
Đáp án là C.
Có thể suy ra gì về Canada’s Bay of Fundy?
A. Nó có thể trải qua sóng thần do thủy triều cực đại.
B. Nó có thể có chu ký thủy triều dài hơn do sự đa dạng.
C. Nó có thể rất hẹp vì có nhiều thủy triều khác nhau biên độ lớn.
D. Nó có thể bị ảnh hưởng nhiều hơn bởi trọng lực so với những nơi khác.
Dẫn chứng: The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.
[ Sự khác nhau về độ cao giữa nước cao và nước thấp được gọi là biên độ thủy triều, và nó khá là kịch tính ở những vịnh hẹp hơn. Canada’s bays of Fundy , ví dụ, trải nghiệm phổ biến những vùng thủy triều mạnh nhất thế giới, với sự khác nhau mỗi ngày 16 mét.]
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.
The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food. Glaciers are a possible source of fresh water that has been overlooked until recently. (A)
Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica. (B)
Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes; rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. (C)
The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalination, or removing salt from water. (D)
What are the technical matters mentioned as the difficulty arising in the process of obtaining fresh water from the iceberg?
A. The prevention of rapid melting iceberg
B. The filtering water and the funneling it to shore in a large amount
C. The purifying the fresh water and carrying it to shore
D. The prevention of rapid melting and the funneling to shore in great volume
Đáp án : D
Thông tin ở câu đầu tiên đoạn cuối: “The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume.”
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.
Tides are the periodic rise and fall of the Earth’s waters that are caused by the Moon’s and Sun’s forces of gravity acting on the Earth .It is important to distinguish natural tidal phenomena from huge tsunamis , with the latter being caused by earthquakes and undersea volcanic eruptions.
The Moon is a main factor controlling ordinary tides. At the location on the Earth closest to the Moon, it exerts a powerful gravitational pull on the water. The resulting rise in the water produces higher tides. The water on the side of the Earth farthest away from the Moon also gets pulled by this lunar gravity, but not as strongly. The Earth itself has its own gravitational force that is constantly pulling waters downward, which is why the oceans do not simply bulge out toward the Moon. Ordinary tides usually feature high and low waters alternating in relation to the Earth’s rotation. Most shores around the world have high waters and two low waters for each day, which last about 24 hours and 50 minutes. The difference in height between the high water and low water is called the range of tide, and it can be quite dramatic in narrower bays .Canada’s bays of Fundy , for example , commonly experiences the world’s most extreme tidal ranges , with daily differences of the 16 meters.
Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force. When the Sun, the Moon and the Earth are directly in line, the solar and lunar gravitational forces add up to produce higher spring tides. The range of spring tides is intensified, with higher water marks and lower low water marks. However, when the Moon is in the first or third quarter, it is at a 90–degree angle with the Sun in relation to the Earth .The opposing solar and lunar forces partially cancel each other out, and the result is a lower tide. This is called a neap tide, which comes twice a month and has lower high water marks and higher low water marks. The range of neap tides is minimum.
Some tides do not occur over water at all. The solid body of the Earth has slight elasticity, so lunar and solar gravity cause it to stretch very subtly. These changes in the Earth’s shape, although imperceptible to humans, are known as Earth tides. Another tidal phenomenon, atmospheric tides, is caused by the Sun’s heating of the Earth’s atmosphere. Like ordinary tides, they usually occur over 12–hour periods.
What is true about the Moon’s gravitational force?
A. It pulls water on the far side of the Earth more strongly.
B. It is more than twice as powerful as that of the Sun.
C. It has reduced gravity when it is lined up with the Sun and the Earth.
D. Its force is strongest when it is located at 90 degrees to the Earth.
Đáp án là B.
Câu nào sau đây đúng về lực hút của mặt trăng?
A. Nó đẩy nước ở phía xa Trái Đất mạnh hơn.
B. Nó mạnh hơn mặt trời gấp hai lần.
C. Nó giảm trọng lực khi mặt trăng và mặt trời thẳng hàng với nhau.
D. Lực của nó mạnh nhất khi được đặt ở 90o so với Trái Đất.
Dẫn chứng: Two other types of tides are influenced by the Sun, which is much farther away from the Earth and exerts less than half of the Moon’s gravitational force.
[ Hai dạng còn lại của thủy triều bị ảnh hưởng bởi Mặt Trời, xa Trái Đất hơn và sử dụng ít hơn phân nửa trọng lực.]
Choose the correct sentence among A, B, C or D which has the same meaning as the given one
1. This sweater must be washed in warm water
A. You must wash this sweater in warm water
B. Wash this sweater in warm water, pleased
C. Warm water has to be washed in this sweater
D. We had to wash this sweater in warm water
2. I have never seen this style of jeans before
A. It's this style of jeans that I have never seen
B. It's the first time I've ever seen this style of jeans
C. It's the new chance that I saw this style of jeans
D. It's the fact that I have ever seen this style of jeans
3. The secretary wrote the report in half an hour
A. It took the secretary half an hour to write the report
B. It took half an hour for the secretary to write the report
C. It took the secretary half an hour writing the report
D. It took the secretary half an hour wrote report
4. Farmer Lum was planting some flowers when we came
A. Some flowers were being planted by Farmer Lum when we came
B. Some flowers were being planted when we came by Farmer Lum
C. Some flowers were being planted by Farmer Lum when we came
D. Some flowers were being planted by Farmer Lum when we were come
5. How long have you worked as a designer?
A. When have you worked as a designer?
B. When did yoj start working as a designer?
C. When did you design your work?
D. When did you begin working for a designer?
Choose the correct sentence among A, B, C or D which has the same meaning as the given one
1. This sweater must be washed in warm water
A. You must wash this sweater in warm water
B. Wash this sweater in warm water, pleased
C. Warm water has to be washed in this sweater
D. We had to wash this sweater in warm water
2. I have never seen this style of jeans before
A. It's this style of jeans that I have never seen
B. It's the first time I've ever seen this style of jeans
C. It's the new chance that I saw this style of jeans
D. It's the fact that I have ever seen this style of jeans
3. The secretary wrote the report in half an hour
A. It took the secretary half an hour to write the report
B. It took half an hour for the secretary to write the report
C. It took the secretary half an hour writing the report
D. It took the secretary half an hour wrote report
4. Farmer Lum was planting some flowers when we came
A. Some flowers were being planted by Farmer Lum when we came
B. Some flowers were being planted when we came by Farmer Lum
C. Some flowers were being planted by Farmer Lum when we came
D. Some flowers were being planted by Farmer Lum when we were come
5. How long have you worked as a designer?
A. When have you worked as a designer?
B. When did yoj start working as a designer?
C. When did you design your work?
D. When did you begin working for a designer?
Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42.
The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food. Glaciers are a possible source of fresh water that has been overlooked until recently. (A)
Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica. (B)
Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes; rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. (C)
The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalination, or removing salt from water. (D)
Question 36: What is the main topic of the passage?
A. The movement of glaciers.
B. Icebergs as a source of fresh water.
C. Future water shortages.
D. The future of the world's rivers.
Đáp án B
Dịch nghĩa: Đâu là chủ đề chính của bài viết?
A. Sự di chuyển của sông băng B. Núi băng là một nguồn nước ngọt
C. Sự thiếu nước trong tương lai D. Tương lai của những dòng sông trên trái đất
Giải thích: Ngay từ câu mở đầu, tác giả đã đề cập đến chủ để bài viết: “The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life” Và ở các đoạn sau, tác giả tiếp tục triển khai về lượng nước ngọt có trong núi băng (đoạn 2), băng trôi (đoạn 3) và hiệu quả của lấy nước ngọt từ băng so với các phương thức khác (đoạn 3). Như vậy, tổng kết cả bài thấy B là nội dung chính.