问题
单项选择题
不与生物碱沉淀试剂发生沉淀反应的化合物是（）
A.山莨菪碱
B.延胡索乙素
C.去甲乌药碱
D.麻黄碱
E.苦参碱
答案
参考答案：D
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不与生物碱沉淀试剂发生沉淀反应的化合物是（）
A.山莨菪碱
B.延胡索乙素
C.去甲乌药碱
D.麻黄碱
E.苦参碱
参考答案：D
| 阅读理解。 | ||||||||
Look at the bulletin board (公告栏) of Class 3B.
| ||||||||
| 1. Elsa wants to _____. | ||||||||
| A. find a cute cat B. buy a good house C. find a new home for a cat D. make friends with someone who has a cat | ||||||||
| 2. Mr Jones will teach the students _____ in his talk. | ||||||||
| A. how to drive a car B. how to take music notes C. how to learn lessons well D. how to be safe on the road | ||||||||
| 3. Mr Jones' talk lasts _____. | ||||||||
| A. half an hour B. one hour C. two hours D. three hours | ||||||||
| 4. Tony wants to buy the new notebook from Jack. He should pay _____. | ||||||||
| A. $2 B. $3 C. $5 D. $17 | ||||||||
| 5. David lost his wallet on January 5. What should he do? | ||||||||
| A. Go to the gym at once. B. Ask Ms Chang about that. C. Meet Jack in the music class. D. Wait at the front door of the classroom. |
