哺乳期妇女避孕应在产后
A.6周
B.12周
C.18周
D.24周
E.30周
参考答案:A
The passengers were robbed _____ all their money.[ ]
A. of
B. off
C. from
D. away
缩窄性心包炎的特征性X线征象是()
A.心影近似三角形
B.两心缘僵直,分界不清,伴胸膜炎改变
C.心脏搏动减弱,消失
D.上腔静脉扩张
E.心包壳状钙化