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问题 单项选择题

三氯化铁试剂与酚羟基发生呈色反应，可用于芳胺类某些药物的区别，具三氯化铁反应的是：

A．利多卡因

B．醋氨苯砜

C．苯佐卡因

D．对乙酰氨基酚

E．普鲁卡因

答案

参考答案：D

填空题

根据句意，用括号内所给单词的适当形式填空。

1. Would you mind  _____ (teach) me English?

2. Shall I  ____ (clean)the door now, mom?

3. Many students teach _____ (them)on the Internet now.

4. David Beckham is my favorite _____ (play).

5. _____ (take)good care of the baby is his duty.

6. She mustn't _____ (stay)up too late.

7. Do we need _____ (bring)the raincoat with us?

8. One of our classmates _____ (come)from Hunan.

9. Do you have fun _____ (study)English?

10. Michael spends two hours _____ (exercise)every day.

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单项选择题

当石质坚硬完整且岩石抗压强度大于30MPa，并确认不影响结构稳定和强度时，允许岩石个别凸出部分在1m2不大于( )m2。

A．0.05
B．0.1
C．0.15
D．0.20
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