The master got permission to pump out 500 tons of clean sea water for ().
A. the purpose of trimming
B. the approval for ballast
C. the purpose of voyage
D. the approval for operatio
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从构词法角度看,“血红”是限定式,“口红”是陈述式。
A. 正确
B. 错误
电针电流的波型中,密波的频率为每秒____次,疏波的频率为每秒____次。
The sports meet originally due to be held last Friday()(最终因天气不好而取消了).
电车司机在接焦完毕走行前,为确保推焦确实结束,较好的做法是()
A. 走行低速启动
B. 等导焦格子后退时才走行
C. 确认导焦格子尾部无红焦落下
D. 等导焦车走行时才走行