新版输气工（初级

AG021() 就是把电气设备在正常情况下不带电的金属部分与电网的零线紧密地连接起来。

发布于 2021-04-19 22:43:59

【单选题】
A 保护接地
B 漏电保护
C 保护接零
D 屏护

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1

A. Listening should come before reading. B. It's more effective to combine listening with reading C. It's most helpful to read English newspapers every day. D. Reading should come before listening.

2

335.电容器充电过程中，其()

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AG021保护接地是防止电气设备意外带电造成触电事故的基本技术措施 ,在lOOOV 及以下的低压系统中为限制设备漏电时外壳对地电压不超过安全范围 ,一般要求保护接地电阻() 。

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A. Yes, he did it in the afternoon. B. No, but he will do it later. C. Yes, he has already finished it. D. No, he is packing the luggage now.

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A. Because she doesn't want to visit her parents alone. B. Because she is worried about their parents. C. Because she wants him to attend the parents'meeting alone. D. Because she would like to attend the parents' meeting with him.

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能力验证是指利用实验室间比对来确认实验室检测/校准能力的活动，实验室维持较高的检测/校准水平而对其能力进行()的一种验证活动。

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A. Surely on Friday morning. B. Maybe on Friday morning. C. Surely on Friday evening. D. Maybe on Friday evening.

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