题目

给下列句子选择恰当的答语。⑴Is it in your bag？ ⑵Where is my car?⑶What's in the desk?⑷Have a good time. ⑸Who's that boy?A.He's my brother.B.Yes, it is.C.Thanks, Mum.D.My ruler.E.It's under the chair. 答案：【1】B【2】E【3】D【4】C【5】A在同一个圆里，直径和半径的关系用字母表示是________．