电力变压器有载分解开关切换过程程序与时间停电试验，正反方向的

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问题单项选择题

电力变压器有载分解开关切换过程程序与时间停电试验，正反方向的切换程序与时间均符合制造厂要求，无（）现象。

A.短路

B.开路

C.开环

D.闭环

答案

参考答案：B

句型转换

按要求改写下列句子,每空一词.

1. My sister was ill last week. (改为一般疑问句)

________ ________ sister ill last week?

2. They were very busy last Sunday. (改为否定句)

They ________ ________ very busy last Sunday.

3. Did you go to the bookstore yesterday? (作否定回答)

________, I ________.

4. Tom bought a lot of gifts. (改为一般疑问句)

________ Tom ________ a lot of gifts?

5. They watched a movie about sharks last night.(改为否定句)

They ________ ________ a movie about sharks last night.

多项选择题

物流设施标准包括（）。

A．物流设施设备基础标准

B．物流设施

C．集装化器具

D．物流设备

E．物流信息标准