应尽量避免空载线路（或空载变压器）产生2次谐波谐振的（）以及

搜题请搜索小程序“爱下问搜题”

问题多项选择题

应尽量避免空载线路（或空载变压器）产生2次谐波谐振的（）以及防止在故障时出现该种谐振的接线。

A.使用方式

B.运行方式

C.操作方式

D.结构形式

答案

参考答案：B, C

补全对话，情景问答

根据对话情景，在空白处填入合适的句子。

A: It's Sunday tomorrow. 1. ?

B: Oh, I am going to watch a football match. It's between Korea and China.

A: Wonderful! I really hope we'll win this time. 2. ?

B: At 3 o'clock in the afternoon. I have two tickets here. 3. ?

A: Of course I'd love to. But I can't. We will have a basketball match tomorrow afternoon.

B: What a pity! 4. ?

A: A team from No. 2 Middle School.

B: 5. ?

A: In our school.

B: Good luck to you and your team then!

A: Thank you. See you later.

B: See you.

选择题

“一方水土养一方人”，人文活动深深地打上了自然环境的烙印，下图中民族乐器应属于我国哪一地区( )

A．北方地区

B．南方地区

C．西北地区

D．青藏地区