小青龙汤证的病机是()。
A.外感风寒,内停水饮
B.外感风寒,痰热内蕴
C.凉燥外袭,肺失清肃
D.风邪伤肺,肺失清肃
E.痰延壅盛,上实下虚
参考答案:A
A passenger train ________ about 1,500 people fell into the river when the bridge collapsed.[ ]
A. carrying
B. carried
C. to be carried
D. to carry
药粉细度的分级标准是什么?