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问题 多项选择题

电动机的基本控制就是启动和停车，也就是电源的接通与切断。常用的控制方法有：（）。

A.三相刀闸控制

B.接触器控制

C.磁力启动器控制

D.电动机正反转控制

答案

参考答案：A, B, C, D

补全对话，情景问答

补全对话。

Celio: Hi, Jim. What's the weather like today?

Jim: It's cool today. Today is Friday. 1_______________________________?

Celio: We have English and music on Fridays. Look! 2_______________________________?

Jim: He's my P. E. teacher.

Celio: 3_______________________________? 

Jim: He's very kind.

Celio: 4_______________________________?

Jim: No, he's not funny.

Celio: Oh, tomorrow is weekend. 5_______________________________?

Jim: I often play ping-pong. What about you?

Celio: I play ping-pong, too.

Jim: It's six o'clock. It's time to go home. See you.

Celio: See you.
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单项选择题

眼部的感觉神经是

A．泪腺神经和额神经
B．额神经和滑车神经
C．泪腺神经和动眼神经
D．额神经和展神经
E．滑车神经和鼻睫神经
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