问题
单项选择题
在胃酸中不稳定，易被破坏的抗生素是（）
A．红霉素
B．琥乙红霉素
C．克拉霉素
D．阿齐霉素
E．罗红霉素
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
在胃酸中不稳定，易被破坏的抗生素是（）
A．红霉素
B．琥乙红霉素
C．克拉霉素
D．阿齐霉素
E．罗红霉素
参考答案：A
| 选词填空。 从方框里选择正确的单词，并用其正确的形式填空。 | |
2. The cool water_____ him after his long sleep. 3. I got an _____shock from the wire. 4. We have to find ways of making the ____system work better. 5. This kind of dress is only appropriate for____ affairs. 6. I missed the train and_____ was late for work. 7. I made a _____of $100 to the Famine Relief Fund. 8. I was asked to give a short _____on the aims of the plan. 9. Exercise and good food are important to the proper ____of a child. 10. She was _____in England in the 1930s. |