Which kind of vessel is not required to comply with the ISM code until 2002?()
A. Passenger ships and high-speed crafts of 500 gross tons or more
B. Oil tankers and Chemical tankers and Gas carriers
C. Bulk freight vessels
D. General cargo vessels
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信息可以双向传输的信通是全双工信通。
A. 对
B. 错
电力专用UPS主、从机之间的切换检查工作应每月检查一次。
A. 对
B. 错
我国蓄电池容量的定义是以某一恒定电流放电10小时,此时单体蓄电池电压降低至1.8V的安时数即为蓄电池十小时率容量,符号为C10。
A. 对
B. 错