根据感染途径,肺脓肿的类型有()
A.吸入性肺脓肿
B.继发性肺脓肿
C.血源性肺脓肿
D.机会性肺脓肿
E.创伤性肺脓肿
参考答案:A, B, C
写出下列单词的缩写形式。
1. what is __________________
2. he is __________________
3. who is __________________
4. it is __________________
5. they are __________________
6. I will __________________
7. is not __________________
8. can not __________________
9. are not __________________
10. do not __________________
工作闸门常在()中启闭,检修闸门在()中启闭,事故闸门常在()中快速关闭,在()中开启。