心悸不安,精神涣散,多由下列何种因素引起()
A.喜伤心
B.怒伤肝
C.思伤脾
D.悲伤肺
E.恐伤肾
参考答案:A
30. —______ you pass the examination on the first attempt?
—Of course. You know, I have been preparing for it for a long time.
A.Can
B.May
C.Shall
D.Could
水洗型荧光渗透法中,为了检查清洗效果,应在水洗位置安装()