肺痨的基本病理性质是()
A.阴虚
B.气虚
C.阳虚
D.血虚
E.本虚
参考答案:A
___ a lot of work to do, all the workers are not allowed to take their holidays.
A.Because
B.For
C.Since
D.With
清吹的时间根据排气道的容积来选择,至少能将整个排气道体积()的空气吹除掉,这样可避免爆燃。
A、一倍
B、两倍
C、三倍