既能和解退热、又能升阳举陷的药物是()
A.葛根
B.柴胡
C.黄芪
D.升麻
参考答案:B
Many a student _____ playing games on the playground and only one girl or two _____ reading in the classroom.
A.are; are
B.is; is
C.are; is
D.is are
型钢矫直机主要工艺参数有()。
A.矫直辊的数量
B.矫直辊辊距
C.矫直压力
D.矫直速度
E.矫直温度