人体内合成尿素的主要脏器是
A．脑
B．肌肉
C．肾
D．肝
E．心
参考答案：D
— What _____ do you like?
— I run every morning, and often play tennis at weekends. [ ]
A. sports
B. music
C. art
D. subjects
献血前适量饮水有什么好处？
