检查和清扫断路器电磁操动机构的内容主要有（）等A、辅助开关检

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问题多项选择题

检查和清扫断路器电磁操动机构的内容主要有（）等

A、辅助开关检查

B、各接线端子检查

C、各连板检查及转动部位加润滑油

D、合闸保持部分检查

答案

参考答案：A, B, C, D

选择题

—Your sister nearly _______ all her spare time to her study during the three years.

—That's right, or she ________ the first place in her school in the examination.

A．devoted; wouldn't have taken

B．spent; wouldn't have taken

C．had devoted; hadn't taken

D．had spent; couldn't take

单项选择题

与腮腺分泌活动有关的神经节是（）

A．翼腭神经节

B．三叉神经节

C．耳神经节

D．下颌下神经节

E．星状神经节