开放性骨折不宜做复杂内固定的时限为伤后超过（）。
A.5小时
B.6小时
C.7小时
D.8小时
E.9小时
参考答案：D
用所给动词的正确时态填空
1. It takes about an hour _______(go) to Changzhou by bus.
2. He left home without _______(tell) his mother.
3. My sister seldom _______ (play) volleyball now .
4. Look ! Lily's cat _______ (lie) on the sofa comfortably .
5. It's time for us _______(exercise) now.
6. I am planning _______ (take) a holiday to the USA.
从有n个节点的顺序表中删除一个节点平均需要移动的节点个数是______。
