单体柱支护工作面，当采高突然变化超过支柱最大高度时，应及时更

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问题单项选择题

单体柱支护工作面，当采高突然变化超过支柱最大高度时，应及时更换相应规格支柱，（）采取在支住底部垫木板、歼石等临时措施支设。

A.暂时

B.也可以

C.不得

D.临时

答案

参考答案：C

阅读理解

阅读简答。

Last week's talent show was a great success. There were fifteen acts. Eliza Clark won the prize for the

best performer. She played a beautiful piano piece. Hu Yue was the quietest performer. He danced

without music. The prize for the funniest act went to Steve Tian and his dog, Fido. They sang a cute song

together.

根据短文内容，回答下列问题。

1. Was last week's talent show a great success?

__________________________________

2. How many acts were there in last week's talent show?

__________________________________

3. What did Eliza Clark do in the talent show?

__________________________________

4. How did Hu Yue dance?

__________________________________

5. Who won the prize for the funniest act?

__________________________________

多项选择题

制钱的落后性表现在（）

A、统治者对制钱贬值，以此对人民实行超经济剥削

B、分散铸造的政策，造成制钱纷繁杂乱

C、集中铸造的政策，造成制钱品种单一

D、制钱的流通有很大的局限性

E、制钱的流通毫无局限性