题目内容

根据我国《钢质海船入级规范》规定,启动空气瓶的总容量在不补充充气情况下,对可换向柴油机正倒车交替启动()。

A. 至少连续启动12次
B. 至少冷机连续启动12次
C. 至少热态连续启动8次
D. 至少冷机连续启动8次

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四冲程柴油机某缸气缸启动阀卡死不能开启而使曲轴停在某一位置不能启动时,下列说法正确的是()。

A. 飞轮指示在上止点后0°~140°的缸为故障缸
B. 飞轮指示在上止点后0°~140°进排气阀都关闭的缸为故障缸
C. 飞轮指示在上止点后0°~140°排气阀关闭的缸为故障缸
D. 飞轮指示在上止点后0°~120°的缸为故障缸

The most frequent attacks to respiratory system come from _______ and ______

A. common cold, flu viruses
B. cough, asthma
C. influenza, cancer
D. chest pain, Tuberculosis

Influenza is a _____disease of the respiratory tract.

A. inflammatory
B. fungal
C. viral
D. bacterial

Pneumonitis, an inflammation of the lungs caused by infection, is equal to ____

A. pneumonia
B. edema
C. jaundice
D. influenza

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