其发病原因是:
A.产时失血过多
B.气血两虚
C.感染邪毒
D.气滞血瘀
E.以上都不是
参考答案:C
4,4,16,144,( )
A.162
B.2304
C.242
D.512
We don't doubt _____ he will succeed in the research work.
[ ]
A. that
B. whether
C. how
D. what