在寒冷地区航行轮机部必须做到： 1.对救生艇机、应急发电柴油机带动的应急救火设备，向冷却水中添加防冻剂，做好保温加热工作。 2.保持机舱或舱室的温度，关妥门窗和通风口，必要时给以加热。
查看答案
在图19—6中，总需求曲线的移动可能是下面哪一项的结果？________。
A. 货币量的增加
B. 外国收入的下降
C. 税赋增加
D. 价格水平下降
E. 预期未来利润率下降
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
The word "off-limit" in the passage may mean
A. off-set
B. off-state
C. within limits
D. beyond the limit
According to the passage, it is recommended that the heat exchanger side be cleaned by
A. flushing with chemical solvent without being dismantled
B. brushing mechanically after being disassembled
C. flushing with flesh water only
D. flushing with clean oil only
微信支付 
支付宝支付