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举一反三
【多选题】需求法则是指__。
A.
商品价格提高，对该商品的需求量减少
B.
商品价格提高，对该商品的需求量增加
C.
商品价格下降，对该商品的需求量增加
D.
商品价格下降，对该商品的需求量减少
E.
商品与价格呈反向变化
【单选题】Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between the suburbs and the downtown area. Maps and schedules are available from t...
A.
within downtown areas
B.
away from city centers
C.
in or outside big modern cities
D.
between suburbs and city centers