海船是指航行于海上以及江海直达的各类船舶,但不包括()
A、军事船舶
B、渔业船舶
C、体育运动船
D、非营业性游艇
参考答案:A, B, C, D
Jenny went into the room, took off her coat and ______ down on a sofa. [ ]
A. would sit
B. was sitting
C. sat
D. had sat
主变冷却器风扇装好后,应用500∨摇表测量电动机及接线的绝缘电阻,数值不得低于0、5MΩ,同时用手转动扇叶,应()现象。
A、无摆动
B、无卡阻
C、无窜动
D、无漏电