The volume of salt in sea water is 0.57%, the volume of water in sea water is 5%. How many kilograms of salt prepared from 1 tons of sea water?
Sea water contained 3% of salt. Given 1,3L sea water weightd 1365g. How many liters of sea water must be evaporated to gain 252kg of salt.
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)
How are icebergs formed?
A. They break off from glaciers
B. Seawater freezes
C. Rivers freeze
D. Small pieces of floating ice converge
Đáp án : A
Thông tin ở đoạn 3: “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.”
In 80kg 2,8kg sea salt. Find the percentage ratio of the amount of salt in sea water.
Read the following passage and choose the best option A, B, C or D to be used for each of the blanks to complete the following passage from 16 to 20.
Water is of vital importance to all living things. Without it, all living things will surely die. We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes.
The Earth's surface is (17)_____ by large areas of water which we call oceans and seas. If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land. Rivers carry it to the sea.
Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight. The reason is that sunlight is made up of many colors. Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey.
Điền ô số 19
A. of
B. within
C. with
D. in
Kiến thức: Giới từ
Giải thích:
of (prep): của within (prep): trong vòng
with (prep): với in (prep): trong
“in the sunlight”: dưới ánh mặt trời
Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight.
Tạm dịch: Mặc dù cả nước mặn và nước ngọt đều không có màu gì, biển thường có màu xanh dưới ánh sáng mặt trời.
Chọn D
Read the following passage and choose the best option A, B, C or D to be used for each of the blanks to complete the following passage from 16 to 20.
Water is of vital importance to all living things. Without it, all living things will surely die. We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes.
The Earth's surface is (17)_____ by large areas of water which we call oceans and seas. If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land. Rivers carry it to the sea.
Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight. The reason is that sunlight is made up of many colors. Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey.
Điền ô số 18
A. attraction
B. presence
C. advantage
D. influence
Kiến thức: Từ vựng
Giải thích:
attraction (n): sự thu hút, sự lôi cuốn presence (n): sự hiện diện
advantage (n): lợi thế, ưu điểm influence (n): ảnh hưởng
If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land.
Tạm dịch: Nếu bạn đã nếm nước từ biển, bạn sẽ biết rằng, không giống như nước ngọt, nước biển có vị mặn. Điều này là do sự hiện diện của natri clorua đến từ đất.
Chọn B
Read the following passage and choose the best option A, B, C or D to be used for each of the blanks to complete the following passage from 16 to 20.
Water is of vital importance to all living things. Without it, all living things will surely die. We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes.
The Earth's surface is (17)_____ by large areas of water which we call oceans and seas. If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land. Rivers carry it to the sea.
Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight. The reason is that sunlight is made up of many colors. Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey.
Điền ô số 20
A. Therefore
B. Hence
C. Consequently
D. However
Kiến thức: Liên từ
Giải thích:
Therefore: do đó Hence: do đó, cũng vì lý do đó
Consequently: do đó, bởi thế However: tuy nhiên
Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey.
Tạm dịch: Một số màu biến mất nhanh chóng trên biển nhưng ánh sáng xanh bị dội ngược lại hoặc bị phản xạ, lên bề mặt. Điều này làm cho biển trông xanh. Cũng bởi lý do này, một bầu trời giông bão sẽ làm cho biển trông xám xịt.
Chọn B
Dịch bài đọc:
Nước có tầm quan trọng sống còn đối với mọi sinh vật. Không có nó, tất cả các sinh vật sống chắc chắn sẽ chết. Chúng ta cũng sử dụng một lượng nước lớn hàng ngày trong nhà, trong các nhà máy và trong các nhà máy điện. Hầu hết nước này là nước ngọt và nó đến với chúng ta từ các hồ chứa, sông hồ.
Bề mặt Trái đất được bao phủ bởi những vùng nước rộng lớn mà chúng ta gọi là đại dương và biển. Nếu bạn đã nếm nước từ biển, bạn sẽ biết rằng, không giống như nước ngọt, nước biển có vị mặn. Điều này là do sự hiện diện của natri clorua đến từ đất. Sông mang nó ra biển.
Mặc dù cả nước mặn và nước ngọt đều không có màu gì, biển thường có màu xanh dưới ánh sáng mặt trời. Lý do là ánh sáng mặt trời được tạo thành từ nhiều màu sắc. Một số màu biến mất nhanh chóng trên biển nhưng ánh sáng xanh bị dội ngược lại hoặc bị phản xạ, lên bề mặt. Điều này làm cho biển trông xanh. Cũng bởi lý do này, một bầu trời giông bão sẽ làm cho biển trông xám xịt.
Read the following passage and choose the best option A, B, C or D to be used for each of the blanks to complete the following passage from 16 to 20.
Water is of vital importance to all living things. Without it, all living things will surely die. We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes.
The Earth's surface is (17)_____ by large areas of water which we call oceans and seas. If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land. Rivers carry it to the sea.
Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight. The reason is that sunlight is made up of many colors. Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey.
Điền ô số 16
A. number
B. measure
C. quality
D. amount
Kiến thức: Từ vựng, cụm từ
Giải thích:
“water” là danh từ không đếm được, cho nên ta dùng cụm “a great amount of”
We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes.
Tạm dịch: Chúng ta cũng sử dụng một lượng nước lớn hàng ngày trong nhà, trong các nhà máy và trong các nhà máy điện. Hầu hết nước này là nước ngọt và nó đến với chúng ta từ các hồ chứa, sông hồ.
Chọn D
Read the following passage and choose the best option A, B, C or D to be used for each of the blanks to complete the following passage from 16 to 20.
Water is of vital importance to all living things. Without it, all living things will surely die. We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes.
The Earth's surface is (17)_____ by large areas of water which we call oceans and seas. If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land. Rivers carry it to the sea.
Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight. The reason is that sunlight is made up of many colors. Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey.
Điền ô số 17
A. covered
B. reserved
C. constructed
D. included
Kiến thức: Từ vựng
Giải thích:
cover (v): bao phủ reserve (v): dự trữ, để dành
construct (v): xây dựng include (v): bao gồm
The Earth's surface is (17)_____ by large areas of water which we call oceans and seas
Tạm dịch: Bề mặt Trái đất được bao phủ bởi những vùng nước rộng lớn mà chúng ta gọi là đại dương và biển.
Chọn A
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 39: According to the author, most of the world's fresh water is to be found in _______.
A. oceans
B. rivers
C. glaciers
D. reservoirs
Đáp án C
Dịch nghĩa: Theo tác giả, phần lớn nước ngọt trên trái đất được tìm thấy ở trong ________.
A. đại dương B. sông C. sông băng D. hồ chứa
Giải thích: Thông tin nằm ở đoạn 1 “Three-quarters of the Earth’s fresh water supply is still tied up in glacial ice”