根据句意及首字母的提示，补全单词。

1. Jim h_____ his knee when he played basketball.

2. I f_____ off the bike and had a pain in my leg.

3. —What is the m_____ with your finger?

    —I cut it by accident.

4. I had p_____ seeing the blackboard. Maybe I am short-sighted.

5. I saw an a_____ on my way here.  A car hit a bus.

关于胆脂瘤的CT表现，哪一项是错误的（）

A.瘤体可以呈低密度

B.瘤体可以呈等密度

C.瘤体本身可以强化

D.瘤体占位效应较轻

E.瘤体周围无水肿带