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One reason human beings can thrive in all kinds of climates is that they can control the qualities of the air in the enclosed sp
One reason human beings can thrive in all kinds of climates is that they can control the qualities of the air in the enclosed sp
admin
2018-04-27
47
问题
One reason human beings can thrive in all kinds of climates is that they can control the qualities of the air in the enclosed spaces in which they live. Air conditioning is the use of mechanical systems to 【B1】______ that control in such places【B2】______homes, offices, theaters, institutions, factories, airplanes, and automobiles. The most familiar type of air conditioning is summertime cooling. Although important, this is【B3】______one of several aspects of air conditioning. Other applications【B4】______the control of the humidity (or air moisture), cleanliness, circulation of the air, and heating.
Tests have 【B5】______ that people generally feel best 【B6】______ certain temperature, humidity, and air velocity conditions. Temperatures can 【B7】______ from 21.5°C with 70 percent relative humidity to 28 °C with 30 percent relative humidity. Relative humidity is the 【B8】______ of moisture in the air 【B9】______ a specific temperature compared【B10】______the amount it could hold at that temperature.【B11】______air velocities range from 4.5 to 10.5 meters per minute. It is also desirable that an air conditioner【B12】______dust, pollen, smoke, and odors from the air.
In many industrial environments, air conditioning is essential. Most print shops, for example, 【B13】______constant humidity in order to control paper shrinkage and【B14】______the【B15】______operation in some processes.
Libraries, especially ones with rare books, require air control to【B16】______the physical quality of their collections. Bakeries and the tobacco and cotton industries require high humidity【B17】______their products, and perishables such as fruits must be stored in cool, dry rooms. Some electronic components, drugs, and chemicals must be manufactured【B18】______the air is as free as possible【B19】______dust and other particles. Air conditioning is【B20】______in hospitals, especially in operating rooms.
【B13】
选项
A、ask
B、demand
C、request
D、require
答案
D
解析
考查动词辨析。空格处所在句意为:例如,大多数印刷店都______恒定的湿度,来控制纸张的收缩率。D.require“要求”,最符合文意,为正确答案。demand“要求”,表达得语气太重,request则是“有礼貌地要求”,均不符合题意。
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0
考研英语一
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