在等速运行时，若测速回路失压或断线，JSJ没有吸合，便断开（）_爱下问搜题

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问题单项选择题

在等速运行时，若测速回路失压或断线，JSJ没有吸合，便断开（）实现紧急制动。

A.控制回路

B.测速回路

C.励磁回路

D.安全回路

答案

参考答案：D

选择题

He had just lost his job when, at the precise moment, his girlfriend broke up with him. She ____ salt into his wound.

A．rubbed

B．had rubbed

C．would rub

D．was rubbing

问答题简答题

试述甲状腺的触诊注意事项。