井下由采区变电所引出的馈电线上,应装设()A、短路、过负荷、接地和欠压释放保护 B、

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问题:

井下由采区变电所引出的馈电线上,应装设()

A、短路、过负荷、接地和欠压释放保护

B、短路、过负荷、漏电保护装置

C、短路、过负荷、单相断线、漏电闭锁保护装置及远程控制装置

考点:钳工技能考试采掘电钳工采掘电钳工题库
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“元认知”所属的领域是()。

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化学发光标记免疫测定中常用的发光底物为().

A.吖啶酯

B.鲁米诺

C.三联吡啶钌

D.HRP

E.AP

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I was on my way to the Taiyetos Mountains. The sun was setting when my car         31   (break) down near a remote and poor village. Cursing my misfortune, I was wondering where I was going to spend the night when I realized that the villagers who had gathered around me were arguing as to  32    should have the honor of receiving me  33   a guest in their house. Finally, I accepted the offer of an old woman who lived alone in a little house. While she was getting me  34      (settle) into a tiny but clean room, the head of the village was tying up his horse to my car to pull it to  35       small town some 20 kilometres away   36      there was a garage.

I had noticed three hens running free in my hostess’s courtyard and that night one of them ended up in a dish on my table.  37            villagers brought me goat's cheese and honey. We drank together and talked   38            (merry) till far into the night.

When the time came for me to say goodbye to my friends in the village, I wanted to reward the old woman 39           the trouble I had caused    40           .

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接地干线的转角处弯曲半径不得小于镀锌扁钢厚度的( )。

A.一倍
B.两倍
C.三倍
D.四倍

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临床思维的两大要素是()、()。

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