通过利小便以实大便的方法，治疗暑湿泄泻的药物是（）
A.车前子
B.通草
C.滑石
D.篇蓄
E.海金沙
参考答案：A
When and where to enjoy our summer vacation _____ yet. [ ]
A. aren't decided
B. isn't being decided
C. hasn't been decided
D. haven't been decided
如果某商品的价格从3美圆降低到2美圆，需求量从9单位增加到11单位，则该商品卖者的的总收益将（）
A、增加
B、减少
C、不变
D、无法确定
