【名词&注释】
柴油机(diesel engine)、化学品(chemicals)、回转式(rotary)、电势差(electric potential difference)、往复式内燃机(reciprocated internal combustion engine)
[单选题]The cooling water of the diesel engine should be treated with chemical, because it contains .
A. alkali
B. acidity
C. salinity
D. impurity
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举一反三：
[单选题]一船的速度是否为安全航速，主要考虑________。
A. 该船能否采取适当而有效的行动
B. 该船能否在适合当时环境和情况的距离内把船停住
C. A+B对
D. 以上均不对
[单选题]In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .
A. all of the oil used by the engine through a filter
B. some of the oil used by the engine through a filter
C. some of the oil used by the engine through a centrifuge
D. all of the oil used by the engine through a centrifuge
[单选题]铁碳相图上的1148℃线称为( )。
A. 共析线
B. 固溶线
C. 共晶线
D. 晶格转变线
[单选题]化学品专用码头上的装货输油臂或软管要增设一段绝缘法兰，目的是?()①防止货品在管中流动时产生的静电;②防止船体由于存在电势差在装货管中发生回路放火现象
A. ①
B. ②
C. ①②
[单选题]根据柴油机的基本工作原理，下列最准确的是()
A. 柴油机是一种往复式内燃机(reciprocated internal combustion engine)
B. 柴油机是一种在气缸中进行二次能量转换的内燃机
C. 柴油机是一种压缩发火的往复式内燃机(reciprocated internal combustion engine)
D. 柴油机是一种压缩发火的回转式内燃机
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