胸腔闭式引流病人血压平稳后应采用（）。
A.侧卧位
B.平卧位
C.坐位
D.半卧位
E.头高脚低位
参考答案：D
People prefer ______ TV or listen to music rather than ______ newspapers to relax themselves. [ ]
A. watching; read
B. watching; to read
C. to watch; read
D. to watch; reading
预混合饲料的混合与配合饲料的混合相比，有那些特点？
