问题
单项选择题
脓液及坏死组织中PABA(对氨基苯甲酸)含量高，因此对磺胺的抗菌作用可产生
A．增强
B．降低
C．无影响
D．无效
E．以上均不是
答案
参考答案：B
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脓液及坏死组织中PABA(对氨基苯甲酸)含量高，因此对磺胺的抗菌作用可产生
A．增强
B．降低
C．无影响
D．无效
E．以上均不是
参考答案：B
| 从方框中选择正确的句子补全对话。 | |
B: I'd love to. I want to buy a coat for myself. (In a shop) C: 2______ A: I'm looking for a pair of black shoes. C: 3______ A: Size five. C: I'm afraid we haven't got any black shoes here now. They are sold out. B: (Turns to the sales lady) Do you have any coats here? C: Yes. 4______ B: 5______ C: Eighty yuan. B: That's a little expensive. Can I try it on? C: Certainly. A: Oh. It looks nice on you! B: OK. I'll take it. |