在一个发信站和一个或多个收信站之间的一个新的单一或多址载频的初次开通测试称为()。
A. FLU完全测试
B. ELU存在载频测试
C. ALU简略测试
D. 入网验证测试
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Sufficient cargo tanks shall be()prior to each ballast voyage in order that,taking into account the tanker’s trading pattern and expected weather conditions,ballast water is put only into cargo tanks which have been crude oil washed.
A. Inerted
B. Crude oil washed
C. Gas freed
D. Battened dow
正弦交流电有效值用()表示。
A. u、e
B. E
C. Um、Im、Em
D. u、i、e