题目内容

If a diesel engine turned over freely but failed to start, the cause could be （）

A. water in the fuel
B. cold lube oil
C. excessive starting air pressure
D. excessive fuel pressure

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CRH2C/CRH380A/AL型动车组300T设备TCR天线安装高度范围为（）。

A. 155±2mm
B. 155±3mm
C. 155±5mm
D. 155±7mm

根据《海关行政处罚实施条例》，“自用”指旅客或者收件人本人自用、馈赠亲友而非为出售或者出租。

A. 正确
B. 错误

Although the main business of the shipowners may be that of brewers，in their capacity as shipowners they must（）by the standard of conduct of the ordinary reasonable Shipowner in the management and control of vessels.

A. judge
B. be judging
C. be judged
D. have judged

简述动火作业的定义。