题目

若⊙O1和⊙O2相交于点A、B，且AB＝24，⊙O1的半径为13，⊙O2的半径为15，则O1O2的长为__________或__________．（有两解） 答案：14，4解析:略根据括号中所给的汉语写单词，使句子完整。1.These years, more and more families have meals in ________ (餐馆) on New Years’ Eve.2.What ______ (其他) things do we need for the birthday party?3.The bag over there is one of my ______ (偶像).4.Thank you for __________ (庆祝)my birthday, I’m so happy.5.The library is new and ________ (现代化的). Let me show you around it.6.__________(地理) is my favourite subject. I like it very much.