题目内容

各台柴油机的调速特性曲线的形状和斜率应基本一致，并呈( )趋势。

A. 上升
B. 下降
C. 平直
D. 弯曲

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柴油发电机组安装质量控制要点：受电侧低压配电柜的开关设备、自动或手动切换装置和保护装置等试验合格，应按设计的自备电源使用分配预案进行负荷试验，机组连续运行( )无故障。

A. 8h
B. 10h
C. 12h
D. 24h

碱性蓄电池，配制好的电解液应静置( )，使其澄清后使用。

A. 1h
B. 2h
C. 3h
D. 4h

The reason for his failure is ______ he didn't work hard.

A. that
B. as
C. since
D. because

Mary is in bed with a fever and she can't hope to ______ the cold in a few days.

A. get over
B. get away
C. get off
D. get out