题目

梯形和平行四边形都具有稳定性。（________） 答案：【答案】×【解析】平行四边形的不稳定性就是指平行四边形边长确定，其形状、大小不能完全确定，如：推拉伸缩门。据此得出结论。梯形和平行四边形具有稳定性是错误的，平行四边形具有不稳定性。故答案为：×。　　从Ⅱ栏中找出Ⅰ栏问句的正确答语. Ⅰ Ⅱ (　　)(1)Are you going to work in Beijing? A. For one year or two. (　　)(2)Are you going to be a journalist? B. Next month. (　　)(3)Are you going to take guitar lessons? C. The city is quiet and beautiful. (　　)(4)Are you going to study computer science? D. I'm going to take singing lessons. (　　)(5)Are you going to watch a dolphin show? E. No. Because I don' like playing the instrument. (　　)(6)What are you going to do? F. I'm going to do some shopping. (　　)(7)When are you going to start? G. No, I'm not. Maybe in Wuhan. (　　)(8)How are you going to be a singer? H. Yes. It's very important and useful. (　　)(9)Why are you going to move there? I. Yes. It's wonderful. (　　)(10)How long are you going to live there? J. Yes. This job is very interesting.