【名词&注释】
心脏性猝死(sudden cardiac death)、锅炉给水泵、口对口人工呼吸(mouth to mouth breath)、机动船(motor vessel)、不具备(does not have)、活塞环磨损(research on wear)
[单选题]口对口人工呼吸不适用()病人。
A. 电击
B. 溺水
C. 服剧毒药者
D. 心脏性猝死
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举一反三：
[单选题]Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger? .
A. Reduce engine speed to idle before removing the filter
B. Soak the dirty filter in kerosene only
C. Blow out the air inlet with compressed air
D. Cover the air inlet after removing the filter
[单选题]When replacing a thermostatic expansion valve sensing bulb, it is necessary to
A. apply a light film of oil to increase heat transfer
B. apply a light film of oil to prevent oxidation
C. apply a heavy coating of grease to function as a heat sink
D. carefully coat the device with silicone sealant to reduce the effects of convective cooling
[单选题]活塞顶部烧蚀不太严重时，可采用改变活塞安装位置的方法使其继续使用，但必须是在_______的条件下
A. 活塞构造适合
B. 顶部强度足够
C. 活塞拆装方便
D. 不具备(does not have)修理
[单选题]活塞上的承磨环的作用是
A. 有利活塞与气缸磨合
B. 减少磨损
C. 防止活塞环磨损(research on wear)
D. 防止活塞裙部磨损
[单选题]锅炉汽压为0.5MPa(≈51m水柱高)，其中水位距热水井液面高为2m，锅炉给水泵的管路阻力以泵静扬程10%计，其工作扬程约为( )。
A. 2m
B. 51m
C. 53m
D. 58.3m
[单选题]机帆并用的在航船舶，在夜间应显示：
A. 上红下绿环照灯
B. 舷灯
C. 与机动船相同
D. 桅灯、舷灯与尾灯，不对水移动时关闭舷灯和尾灯
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