Câu hỏi:
25/04/2020 3,927Read 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 36 to 42.
Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the writhing, twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.
The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house, the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57, 600 pounds. The pressure on the four walls adds up to 172,800 pounds.
If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the enormous inside pressure may cause the building to burst.
Unfortunately, heavy rain and hail often occur in thunderstorms that later produce tornadoes. So people frequently shut all windows to protect their property. This may cause far worse damage later. For the same reason, tornado cellars must have an air vent. Otherwise, the cellar door might be blown out when a tornado passes over it.
According to the passage, the pressure on a building during a tornado can be relieved by ________.
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Trả lời:
Giải bởi Vietjack
Đáp án B
Dựa vào đoạn “If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building” à áp suất trong một tòa nhà trong suốt trận lốc xoáy có thể được giải phóng bằng cách mở cửa sổ
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CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges
“Do you think it will rain?” – “________”
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12/01/2025
20,214
Câu 2:
Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges
“Would you mind helping me carry these bags?” – “________”
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25/04/2020
8,263
Câu 3:
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions
Being a single mother no longer carries the social stigma that it used to
Xem đáp án »
25/04/2020
7,113
Câu 4:
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.
He never suspected that she was a theft
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25/04/2020
4,765
Câu 5:
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 43 to 50.
Native Americans from the southeastern part of what is now the United States believed that the universe in which they lived was made up of three separate, but related, worlds, the Upper World, the Lower World, and This World. In the last there lived humans, most animals, and all plants.
This World, a round island resting on the surface of waters, was suspended from the sky by four cords attached to the island at the four cardinal 'points of the compass. Lines drawn to connect the opposite points of the compass, from north to south and from east to west, intersected. This World to divide it into four wedge - shaped segments. Thus a symbolic representation of the human world was a cross within a circle, the cross representing the intersecting lines and the circle the shape of This World.
Each segment of This World was identified by its own color. According to Cherokee doctrine, east was associated with the color red because it was the direction of the Sun, the greatest deity of all. Red was also the color of fire, believed to be directly connected with the Sun, with blood, and therefore with life. Finally, red was the color of success. The west was the Moon segment; it provided no warmth and was not life - giving as the Sun was. So its color was black. North was the direction of cold, and so its color was blue sometimes purple, and it represented trouble and defeat. South was the direction of warmth, its color, white, was associated with peace and happiness.
The southeastern Native Americans' universe was one in which opposites were constantly at war with each other, red against black, blue against white. This World hovered somewhere between the perfect order and predictability of the Upper World and the total disorder and instability of the Lower World. The goal was to find some kind of halfway path, or balance, between those other worlds.
According to the passage, southeastern Native Americans associated red with all of the following EXCEPT ________
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26/04/2020
4,298
Câu 6:
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions
Power tools require careful handling ________ injuries
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25/04/2020
4,198
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