大量心包积液可出现( )
A.抬举样心尖搏动B.负性心尖搏动C.心尖搏动消失D.心尖搏动位于右锁骨中线第5肋间处E.弥散样心尖搏动
参考答案:C
空气湿度对静电积蓄有哪些影响?
It's very nice _______ you to give me the chance. [ ]
A. of
B. for
C. to
D. at