题目内容

+24伏电源系统第2次下电的电压值,应设定为()。

A. 24.0伏
B. 23.0伏
C. 21.6伏
D. 19.0伏

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检验煅烧程度的主要手段是什么?

食盐中水分测定双试验误差为()。

A. 0.3%
B. 0.05%
C. 0.2%
D. 0.10%

机泵的()损坏,会导致机泵振动。

A. 阀门手轮
B. 对轮罩
C. 密封
D. 轴承

We()our breakfast when the pilot came on board.

A. just have had
B. just had
C. have just had
D. had just had

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