题目

What was the weather like on Saturday?A.Sunny. B.Windy. C.Cloudy. 答案：【答案】A【解析】【原文】M: Did you have good weather at the beach at the weekend?W: Yes, it was sunny all weekend. There wasn’t a cloud in the sky.M: Wasn’t it windy too?W: Only on Sunday.2．如图所示，一定质量的理想气体，从状态1变化到状态2，其P-$\frac{1}{V}$图象为倾斜直线，下述正确的是（　　）A．密度不变B．压强不变C．体积不变D．温度不变