空压机在井上和井下应分别放置在什么地方?
参考答案:
地面设置在空间较大且阴凉处,井下设在进风巷新鲜风流处。
The old man sat in front of the television every evening, happy______ anything that happened to be on.
A.to watch
B.watching
C.watched
D.to have watched
李先生,21岁,咳嗽、咳脓痰10年,间歇咳血,体检左下肺背部闻及湿性啰音,有杵状指,诊断首先考虑
A.肺结核
B.支气管扩张
C.慢性肺脓肿
D.慢性支气管炎
E.肺气肿