How should you warm up a diesel engine that has not been run for some time? （）
A. Run it at minimum speed for a period of time
B. Run it at half speed for a period of time
C. Bring it to top speed immediately
D. Inject ether into the air intake
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Concerning the management of sewage treatment plant using activated sludge, which of the following is correct?（）
A. the plant should be prohibited to supplying air
B. the plant should work at intervals
C. the plant should be added disinfector in time
D. we should check strength of activated sludge, ivory-white color is best
可靠性的的定义为元件、设备化为系统在规定的条件下和预定时间内，完成规定功能的（）。
测定进气歧管真空波形时，在进气歧管上装一个专用传感器，目的是避免干扰ECU的工作。（）
A. 正确
B. 错误
押运财物抵达目的地后，保安员要观察周围动态。办理交接手续时，禁止无关人员接近财物。
A. 正确
B. 错误
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