【名词&注释】
帕斯卡(pascal)、船舶机械(marine machinery)
[单选题]到目前为止，船舶机械的维修方式有( )种
A. 1
B. 2
C. 3
D. 4
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举一反三：
[单选题]Sanitary waste matter will .(1)pass through a screen or cutters (2)come into contact with the bacteria in a tank (3)be discharged, normally without bacteria
A. (1)
B. (1)(2)
C. (2)(3)
D. (1)(2)(3)
[单选题]A segregated ballast system is a system where
A. all ballast is processed through the oily water separator
B. ballast is taken on and discharged through a separate main deck
C. ballast and cargo tanks are separated by cofferdams
D. all ballast lines, tanks, and pumps are independent of those used for oil
[单选题]泵的扬程是指单位重液体通过泵后所增加的能量，其单位是( )。
A. 焦耳
B. 帕斯卡
C. 米
D. 瓦
[单选题]在海面有油火的情况下跳水脱险前应判明：
A. 流向
B. 流速
C. 风向
D. 风速
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