肾气丸的制方原理涉及（）
A.填精化血
B.补气生血
C.阴中求阳
D.壮水制火
E.阳中求阴
参考答案：C
Harry, you can' go out since you haven't finished your homework; __________ , a heavy rain is upon
us tonight.[ ]
A. above all
B. after all
C. in advance
D. in addition
真空粉末低温贮槽的真空夹套的真空度下降到65Pa时，蒸发率增大，不经济，应重新抽真空。
