【简答题】阅读理解。 Mary is an English girl, but she lives in Paris. She is six years old. Her mother says to her,'You are six now, Mary, and you are going to the school here. I'm sure you'll like it very much. It'...
【简答题】□ ABCD 中,对角线 AC 和 BD 交于点 O ,若 AC =8 , AB =6 , BD = m ,那么 m 的取值范围是 ____________. 2. 已知 □ ABCD 的周长等于 48 ,对角线 AC 、 BD 交于点 O , △AOD 与 △AOB 的周长的差是 10 ,则 AB = , AD = .