问题
单项选择题
泵不能启动或启动后熄火的主要原因是：（）。
A.电磁离合器没有通电
B.杂质进入水泵
C.泵的密封不良
D.水泵放水旋塞未关好
答案
参考答案：B
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泵不能启动或启动后熄火的主要原因是：（）。
A.电磁离合器没有通电
B.杂质进入水泵
C.泵的密封不良
D.水泵放水旋塞未关好
参考答案：B
A black car rushed around the busy street corner, towards the courthouse. The dark window rolled down and a semi-automatic stuck out. Pauly Gillespie, a government protected witness (目击者), stood , seeing death walking toward him. Pauly’s FBI bodyguards themselves on top of him, but two were fired and Pauly was hit the shoulder. The car across two lanes (车道) of traffic. Then it turned left down a path and got __ behind a large truck. The two men in the car out and raced away --- into the arms of four policemen. Special agent (特工) Brown was new to the police unit and was told to __ the car out of the path so that the traffic could return to . Brown changed the position of the rearview (后视) mirror _ and drove it around to __ his boss was questioning the two men. Brown stood and watched. One of the men was tall and thin, and _ was five inches shorter, about Brown’s . Agent Fordney asked the two men who had done the shooting. They __ to tell him. Then Brown smiled and said, “I know who the shooter was.” His boss was surprised. How could Brown know that without getting any answer from the two men? When Brown got into the car, he had to adjust the rearview mirror. That meant the previous driver had been of a height. Since the shorter man was close to Brown’s height, he knew the taller man must have been the _. Therefore, the shorter man had done the .
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