How to pump out bilge water in the engine room?
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Have you ever served the auxiliary engine to combustion heavy oil? What should be borne in
Can you measure oil level? Which method is right, to measure ullage height or to measure oil depth?
经济增长率是由________衡量的。
A. 实际GDP的年度百分比的变化
B. 就业的年度百分比的变化
C. 实际GDP水平
D. 人口的年度百分比的变化
E. 人口总量
总劳动时间为2 000亿小时,劳动生产率为45美元/小时,实际GDP是多少?