问题
单项选择题
换热设备名牌一般包含换热面积、管壳程压力、（）、制造单位等。
A.支撑
B.介质名称
C.验收标准
D.流体压差
答案
参考答案：B
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换热设备名牌一般包含换热面积、管壳程压力、（）、制造单位等。
A.支撑
B.介质名称
C.验收标准
D.流体压差
参考答案：B
The Special Satellites Man has invented four kinds of satellites. The first kind of satellite studies the__1__of the earth. They are used to make maps. They also help countries to see where they may__2___ oil or gold. The second kind of satellite is used to guide ships and planes. A ship or a plane can _3__a message to the satellite, and the satellite can find out __4___ the ship or the plane is. The third kind studies the weather. These satellites_5__ the cloud and strong winds moving across the earth. They warn countries to make preparations when _6__ weather is coming. ___7__kind is used for communication. Telephone calls__8_countries can be sent by these satellites. Some can carry hundreds of calls at the same time. The call is sent to the satellites, then the __9__sends it to the station in the country and the country is being phoned. These satellites also carry pictures, they can receive and send __10__at a time, which we can watch on TV.
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