正确答案: A

flow-meter

题目：The______is used to measure the volume of a liquid or gas through a pipeline within any given period of time

解析：A

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举一反三的答案和解析：

[单选题]直航船应包括________。

帆船条款中规定的直航船

[单选题]一具自给式压缩空气呼吸器的使用时间至少是_______。

30分钟

[单选题]If a refrigeration system were short of refrigerant, the condition would result in

continuous running of the compressor

[单选题]加入一定数量的抑制剂和()可以防止自反应聚合。

控制温度