—Do you have to wear ________ uniform?
—Yes, we do. [ ]
A. an
B. a
C. some
答案:B
下列何项不是参苓白术散的君药()
A.淮山药
B.人参
C.白术
D.茯苓
E.白术、茯苓
营销渠道的发展趋势之一是渠道结构扁平化。