ZUO'AN  SHOE  SHOP

Dear friends,

    There are different kinds of female shoes in our store, including high-heeled shoes, low-heeled shoes and flats. This weekends, all the shoes are on sale. You will get each pair shoe at 20% discount.

Time: 9:00 a.m. — 9：00 p.m. on March. 3^rd

    If you want to know more information, you can call Mr. Tian at 13763538666 or come to our website www. zuo'an. com.

    Come and see for yourself!

读黄河流域图，回答下列各题。