I类切口手术预防使用抗菌药物比例不超过（）.
A.20%
B.30
C.40%
D.50%
参考答案：B
根据句意及汉语提示完成下列句子.
1. There are four _____ (老虎) in the zoo.
2. _____ (让我们) see the _____ (熊猫) first.
3. Because they are _____ (几分) cute.
4. _____ (为什么) do you like the _____ (狮子)?
5. He _____ (喜欢) small _____ (动物) very much.
