试题与答案

各种类型的母差保护在双母线或单母线运行时均应投跳闸,在倒换母线时母差保护()。A、停

题型:单项选择题

题目:

各种类型的母差保护在双母线或单母线运行时均应投跳闸,在倒换母线时母差保护()。

A、停用

B、不停用

C、不停用投信号

D、改变保护定值

答案:

参考答案:B

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题型:补全对话,情景问答

根据下面对话情景,在每个空白处填上一个适当的句子,使对话的意义连贯、完整。

A: How was your holiday, Li Ming?

B:    1    . I went to Beijing with my parents.

A: Cool!     2   ?

B: We went to the Summer Palace,

    the Palace Museum, the Great Wall and so on.

A:    3    ?

B: It's interesting. I really like the Palace Museum.

    It has many beautiful things from different dynasties.

A: Did you see any popular stars?

B:    4    . I saw Jackie Chan on the Great Wall.

    And I took some photos with him!

A: Wow, that's great!    5    

B: Sure, I will bring them to school tomorrow.

1._____________________________________________________

2._____________________________________________________

3._____________________________________________________

4._____________________________________________________

5._____________________________________________________

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