Câu hỏi:

04/04/2020 1,596

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
If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salt behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.
The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.
Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.
A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.
In the Weddell Sea, off Antarctica, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.
Why does the author mention the Weddell Sea?

A. To show that this body of water has salinity variations

B. To compare Antarctic waters with Arctic waters

C. To point out the location of deep waters

D. To give an example of cold-water salinity

Xem lời giải

Câu hỏi trong đề: ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH !!

Bắt đầu thi

Trả lời:

Giải bởi Vietjack

Kiến thức: Đọc hiểu

Giải thích:

Tại sao tác giả đề cập đến biển Weddell?

A. Để chỉ ra rằng vùng nước này có các biến đổi độ mặn

B. Để so sánh vùng biển Nam Cực với vùng biển Bắc Cực

C. Để chỉ ra vị trí của vùng nước sâu

D. Để đưa ra một ví dụ về độ mặn của nước lạnh

Thông tin: In the Weddell Sea, off Antarctica, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water.

Tạm dịch: Ở biển Weddell, ngoài khơi Nam Cực, nước dày đặc nhất trong đại dương được hình thành là kết quả của quá trình đóng băng này, làm tăng độ mặn của nước lạnh.

Chọn D

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Bình luận

I demand to know how this vase ______, and no one is leaving till I find out.

You may find doing this job very _______. Try it!

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
“Please, let my child go!” she begged the kidnapper.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The head teacher has asked me to take the new boy under my ______ and look after him.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
She fell over in the last minutes. She didn't win the race.

Turn off this machine, please. The harsh sound really _______ me crazy.

It's very important that we _______ as soon as there's any change in the patient's condition.

VIP +1 tháng ( 199,000 VNĐ )

VIP +3 tháng ( 299,000 VNĐ )

VIP +6 tháng ( 399,000 VNĐ )

VIP +12 tháng ( 499,000 VNĐ )

🔥 Đề thi HOT:

Bình luận

I demand to know how this vase ______, and no one is leaving till I find out.

You may find doing this job very _______. Try it!

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. “Please, let my child go!” she begged the kidnapper.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. The head teacher has asked me to take the new boy under my ______ and look after him.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. She fell over in the last minutes. She didn't win the race.

Turn off this machine, please. The harsh sound really _______ me crazy.

It's very important that we _______ as soon as there's any change in the patient's condition.

VIP +1 tháng ( 199,000 VNĐ )

VIP +3 tháng ( 299,000 VNĐ )

VIP +6 tháng ( 399,000 VNĐ )

VIP +12 tháng ( 499,000 VNĐ )

🔥 Đề thi HOT:

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Quên mật khẩu

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
“Please, let my child go!” she begged the kidnapper.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The head teacher has asked me to take the new boy under my ______ and look after him.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
She fell over in the last minutes. She didn't win the race.