题目内容
阅读下面短文，然后根据短文内容回答问题。
For comfort, when the weather is hot, most people enjoy eating in cool, air-conditioned restaurants．They sleep better in air-conditioned bedrooms．Airplanes, trains, ships, ships, buses, and automobiles that are air-conditioned make traveling more pleasant．Air conditioning helps keep homes clean by taking dirt from the air．Air-conditioned hospitals protect the health and improve the comfort of patients and hospital staffs．
During cold weather, air-conditioning performs much the same services．It supplies clean, moist(潮湿)air that is warmed to the most comfortable temperatures for working and sleeping．
Metals and other materials expand as the temperature rises, and contract as the temperature drops．For this reason, air conditioning is used to control the temperature in factories that manufacture tools or parts for instruments, watches, cameras, and other precision products．Changes in temperature would change the sizes of such products．
In drug and chemical plants, air conditioning not only provides clean air but also removes germs(细菌)from air．Air conditioning keeps moisture at the proper level so that powder, salt, and other chemical substances stay dry．
Air-conditioning systems in commercial buildings are being used increasingly for smoke control during fires．By controlling the airflow, the systems provide smoke-free areas for evacuation and firefighter access．
1．Where do most people enjoy eating when the weather is hot?
Most people enjoy eating in ________ restaurants when the weather is hot．
2．What does air conditioning supply for working and sleeping during cold weather?
It supplies ________ temperatures for working and sleeping．
3．What will happen if metals and other materials as the temperature rises and the temperature drops?
Metals and other materials will ________ as the temperature rises, and ________ as the temperature drops．
4．How do powder and salt stay dry?
Air conditioning keeps moisture ________．
5．What can air-conditioning systems be used in commercial buildings?
They are being used for ________．
解析：
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1．cool/air-conditioned 2．warm/comfortable 3．expand, contract 4．at the proper level 5．smoke controlduringfires |
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