1. [单选题]下列异步电动机中启动性能和运行特性最好的是( )。
A. 鼠笼式异步电机(squirrel cage asynchronous motor)
B. 双鼠笼式异步电机(squirrel cage asynchronous motor)
C. 深槽式异步电机
D. 绕线式异步电机(windings rotor asynchronous motor)
2. [单选题]半圆方向60°SW换算成圆周方向为：()
A. 60°
B. 120°
C. 060°
D. 240°
3. [单选题]胰腺是属于（）系统的脏器
A. 内分泌
B. 免疫
C. 消化
4. [单选题]船舶机械良好的维修性从其( )进行判断。Ⅰ.不需加工 Ⅱ.修理时间短Ⅲ，修理费用低Ⅳ.修理费用高 Ⅴ.对工艺、人员要求低
A. Ⅰ+Ⅱ+Ⅲ+Ⅴ
B. ，Ⅱ+Ⅲ+Ⅳ+Ⅴ
C. Ⅱ+Ⅲ+Ⅴ
D. Ⅰ+Ⅲ+Ⅴ
5. [单选题]____ should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.
A. The watch keeping personnel
B. The chief engineer
C. The person on a bunker barge
D. The duty deck officer
