题目

在矩形ABCD中，AB=3cm，BC=4cm，则对角线BD的长为_______；  答案：5厘米解析:略 12．24．AA．BookstoreB．Shoe StoreC．Post OfficeD．Men's Wear25．BA．find Gate AB．pass the Flower ShopC．go to the Steak HouseD．turn left to the Candy Shop26．CA．find a beltB．look for a CDC．buy some breadD．go to the restroom．