鼻中隔脓肿最常见于（）
A.鼻中隔血肿继发感染
B.鼻中隔术后
C.邻近组织感染波及
D.急性鼻窦炎
E.慢性鼻窦炎
参考答案：A
一个正方形至少需要转（ ）度的角度能和原正方形重合。
在下列各句的空白处填入一个最恰当的单词，使句子意思完整，语法正确。
1. The two boys look very_______. Maybe they are twins.
2. When my bike doesn't work, my father can______it.
3. We will think up some_______to solve the problem.
4. Could you please hand these books_______? We'll use them in class.
5. I think Uncle Zhang can help_______up the watch.
