头痛因于脾的病机是（）
A.脾虚化源不足
B.气血亏虚
C.不能上荣于头
D.脾虚生湿
E.痰浊上蒙清窍
参考答案：A, B, C, D, E
Was it two years ago _____ they first met? [ ]
A. since
B. which
C. while
D. that
下列是按舆论传播是否以媒介为载体为标准划分的是（）.
A.媒介形态
B.潜舆论
C.显舆论
D.行为舆论
