血友病患儿哪个关节最常受累（）。
A.肘关节
B.腕关节
C.髋关节
D.膝关节
E.踝关节
参考答案：D
The representatives were discussing the 11th fiveyear plan that they would like to see ______ the
next year.[ ]
A. carry out
B. carrying out
C. carried out
D. to carry out
歌声对于( )相当于姿势对于( )
A．重要：严格
B．美丽：动听
C．悠扬：优美
D．听觉：状态
