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问题 单项选择题

当中性点不接地系统发生单相接地故障时，开口三角电压为（）

A、180V

B、100V

C、300V

D、300/√3V

答案

参考答案：B

解析：

专业类型：继电保护

设备类型：变压器

难度等级：较难

电压等级：110kV及以下

知识点：基础知识

解答题

凡是对人类有害的动物，我们都应该尽量赶尽杀绝．______．
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填空题

根据括号内汉语，结合句子的意思，在横线上写出形式正确的英语单词。每个空格只准填一个单词。

1. Kate's new house is on the __________ (十二) floor.

2. The little boy likes to __________ (分享) his apples with the little girl.

3. __________ (英雄) appeared one after another after the big earthquake.

4. How many __________ (月) are there in a year? 

5. Listen, how __________ (美妙) the music is!

6. Meg's bike was __________ (偷) last night.

7. Children should learn to __________ (尊重) each other.

8. There is a __________ (职业) player on their team.

9. We spend the night by the lake. It was very __________ (平静).

10. People are much __________ (富有) than ten years ago.

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