问题
选择题
| 已知理想气体的内能与温度成正比。如图所示的实线为汽缸内一定质量的理想气体由状态1到状态2的变化曲线，则在整个过程中汽缸内气体的内能（ ） |
|
| A．先增大后减小 B．先减小后增大 C．单调变化 D．保持不变 |
答案
答案：B
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| 已知理想气体的内能与温度成正比。如图所示的实线为汽缸内一定质量的理想气体由状态1到状态2的变化曲线，则在整个过程中汽缸内气体的内能（ ） |
|
| A．先增大后减小 B．先减小后增大 C．单调变化 D．保持不变 |
答案：B
| 从方框中选择适当的句子完成下列对话。 | |
| |
| A: Have you read today's newspaper? B: No. 1.________ A: Yes. There was a traffic accident on Zhongshan Road yesterday evening. B: 2.________ A: Two pupils were playing football on the street on their way home. 3.________ B: Oh, terrible! What happened then? A: They were taken to the hospital at once. B: 4.________ A: They are getting better. B: 5.________ |