产后出血发生率占分娩总数的()
A.2%~3%
B.5%~6%
C.4%~5%
D.3%~4%
E.1%~2%
参考答案:A
It’s natural that a man can hardly ______ a smile when he hears some good news.
A.hold up
B.hold back
C.hold off
D.hold on
党内民主是党的生命,党务公开是党内民主的重要内容。