预防中心静脉导管感染的无效措施是()
A.外科无菌操作
B.限制敷料更换频率
C.短期使用抗菌药包裹的导管
D.为皮肤制备抗菌药膏
E.尽早拔除导管
参考答案:D
用所给词的正确形式填空
1. Have you decided _____(be) a fire-fighter?
2. The teacher wanted to know who kept the window _____(close).
3. Nick did _____(well) in the long jump than Jim did.
4. Is that book _____(you)?
5. _____(can) you swim when you was four years old?
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