当a=4,b=0.5时,0.9a-0.2b=[ ]
A.2.6
B.3.5
C.2.5
答案:B
— Where does a teacher work? — . [ ]
A. In a hotel
B. In a school
C. In a store
具有解表除烦功效的药物是()
A.桑叶
B.菊花
C.柴胡
D.淡豆豉
E.升麻