受伤达12小时的严重污染伤口应进行何种处理（）
A.一期清创二期缝合
B.缝合
C.一期清创缝合
D.清创
E.以上均不可
参考答案：D
-Though radio and television are ____ popular in the world today, I think the TV is ____ useful.
--Of course, on TV we can see and hear what is going on home and abroad.
A．more, less
B．very, more
C．more, more
D．very, less
拖声、桶声转场
