（） the cylinder will contain a great weight of air and wil

【名词&注释】

不一定(not always)、光学仪器法、平台测量法

[单选题]（） the cylinder will contain a great weight of air and will be capable of burning a great quantity of fuel.

A. At the beginning of the compression stroke
B. At the beginning of the suction stroke
C. At the end of the working stroke
D. At the end of the exhaust stroke

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[单选题]舵系运动件的同轴度检验采用（）。

A. 平台测量法
B. 拉线法
C. 光学仪器法
D. 不一定

[单选题]The engine has one or two group of fuel pumps, depending upon （）.

A. the number of fuel valves
B. the number of cylinders
C. the speed of engine
D. the power of engine

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