下列物质属于有机物的是（ ）
A．食盐
B．碳酸钾
C．碳
D．蔗糖
答案：D
Mr. Brown often tells his son _____ more friends at school. [ ]
A. makes
B. made
C. to make
D. making
与郁证的虚证关系最密切的脏腑是（）
A.心
B.肝
C.脾
D.肾
E.三焦
