分娩期心力衰竭的诱因应排除（）.
A.腹压骤减
B.回心血量骤增
C.体循环血量增加
D.腹压增加
E.回心血量减少
参考答案：B
–How was your interview with the famous basketball player—Yao Ming?
--I was quite nervous at first, but his warm smile put me____.
A．in action
B．at ease
C．on work
D．on watch
我国在2008年北京奥运会上获得51枚金牌，金牌总数位居世界 。 [ ]
A．第一
B．第二
C．第三
D．第四
