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!

制酸奶是在在牛奶中加入了（    ）进行发酵．

如图，在正三棱柱ABC﹣A₁B₁C₁中，点D、E、F分别是BC、AC₁、BB₁的中点．

（1）求证：平面AC₁D⊥平面BCC₁B₁；

（2）求证：EF∥平面A₁B₁C₁．

①走在前列——____

②心思不定——____

③随便走走——____

④人马众多——____

⑤快上加快——____

⑥扩充实力——____

⑦声势浩大——____

⑧境况危险——____

⑨地势平坦——____

⑩单独行动——____