题目内容

链霉素在碱性条件下,经扩环水解生成麦芽酚,该化合物与Fe3+,作用生成()

A. 蓝色化合物
B. 绿色化合物
C. 紫红色络合物
D. 棕色化合物

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青霉素和头孢菌素都属于()类抗生素

A. β-内酰胺
B. 氨基糖苷
C. 四环素
D. 喹诺酮

---I’d like you to meet my new friend, Jim.---_____

A. Hello, there.
B. How do you do, Jim?
C. Nice to see, Jim.
D. How are you, Jim?

---How did you like the TV play?---_____

A. It’s wonderful.
B. That’s all right.
C. Yes, I like it.
D. No, I don’t like it.

---Would you like some milk?--- _____.

A. With pleasure
B. The same to you
C. Help yourself
D. Yes, please