第一心音形成的主要机制是
A.半月瓣关闭B.二尖瓣和三尖瓣关闭C.房室瓣开放D. * * 肌的收缩E.心室壁的震动
参考答案:B
成年患者,烧伤面积93%,三度烧伤面积44%,主要分布在双下肢和右上肢。首次手术宜选择
A.一次性切痂,微粒皮移植
B.一次性切痂,自体、异体皮相间移植
C.一次性切痂,大张中厚皮移植
D.一次性切痂,复合皮移植
E.右上肢一次性切痂,复合皮移植
SWOT analysis is a kind of risk identification method. If the project team chose me ST strategy, they should ______.
A. make full use of the advantage and catch the opportunityB. overcome the weakness and catch the opportunityC. make full use of the advantage and reduce the threatD. overcome the weakness and reduce the threat