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考研
Air is (1)_____, and like all matter, it has weight. Weight is the measure of the (2)_____ of gravity (3)_____ matter. If a scal
Air is (1)_____, and like all matter, it has weight. Weight is the measure of the (2)_____ of gravity (3)_____ matter. If a scal
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2014-06-13
76
问题
Air is (1)_____, and like all matter, it has weight. Weight is the measure of the (2)_____ of gravity (3)_____ matter. If a scale registers 10 kilograms when a stone is placed on it, this means that gravity pulls the stone with that (4)_____ force. (5)_____, earth’s gravity pulls on each (6)_____ of gas and dust on the atmosphere. Because our atmosphere is a. vast (7)_____ of air, it has (8)_____. If it could (9)_____ be compressed and put on a (10)_____ of scales, it would weigh about 5,700,000,000,000,000 (quadrillion) metric tons.
The air pressed down on us and against us (11)_____ all sides. Something (12)_____ a ton of air is pressing against you at this moment. You are not (13)_____ of this because air pressure within your body (14)_____ the pressure of the air outside.
Air pressure is 1.036 kilograms per square centimeter (14.7 pounds per square inch) at sea (15)_____. It is greatest there because that is the (16)_____ of the atmosphere. (17)_____ higher altitudes the pressure is (18)_____. That is why the (19)_____ of highflying planes are pressurized. They are designed to (20)_____ the air pressure our bodies must have.
选项
A、altitude
B、height
C、level
D、degree
答案
C
解析
此题是一道词义辨析题。altitude的含义为"海拔,高度";height的含义为"高度,身高,海拔";level的含义为"水平线,水平面;水平高度";degree的含义为"程度"。根据句意,此处选level最合适。
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0
考研英语一
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