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问题 单项选择题

成基钻井液体系是以人工合成化学品为基液，盐水为分散相，加入乳化剂、降滤失剂和增粘剂等组成的一类（）钻井完井液体系。

A.油包水逆乳化

B.混合

C.水化

D.水包油

答案

参考答案：A

句型转换

句型转换。

1. The boy's mother usually walks to the office. (改为同义句)

    The boy's mother usually goes to the office _____ _____.

2. Mr. Turner bought the car three years ago. (改为同义句)

    Mr. Turner _____ _____ the car for three years.

3. This story excited me most. (改为同义句)

    _____ _____ stones could make me so excited.

4. What do you think of the book Harry Potter? (改为同义句)

    _____ do you _____ the book Harry Potter?

5. You must hand in your history homework by the weekend. (改为被动语态)

    Your history homework _____ _____ _____ _____ by the weekend.

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单项选择题

煅后不用醋淬的药物是

A．自然铜
B．磁石
C．代赭石
D．炉甘石
E．白矾
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