问题
选择题
| 如图所示，在真空容器A的水平底部固定着一个绝热气缸B，绝热活塞P将一部分理想气体封闭在气缸内，气缸内壁光滑，当提起梢子T，活塞在气缸内向右运动的过程中，（ ） A．活塞做匀加速运动，缸内气体温度不变 B．活塞做匀加速运动，缸内气体温度降低 C．活塞做变加速运动，缸内气体温度降低 D．活塞做变加速运动，缸内气体温度不变  |
答案
答案：C
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| 如图所示，在真空容器A的水平底部固定着一个绝热气缸B，绝热活塞P将一部分理想气体封闭在气缸内，气缸内壁光滑，当提起梢子T，活塞在气缸内向右运动的过程中，（ ） A．活塞做匀加速运动，缸内气体温度不变 B．活塞做匀加速运动，缸内气体温度降低 C．活塞做变加速运动，缸内气体温度降低 D．活塞做变加速运动，缸内气体温度不变 |
答案：C
| 完型填空。 | ||||
| I was very fond of hunting when I was a young man. In the autumn of 1915, I was 1 in the northwest of India. One evening, after hunting in the forest all 2 , I was returning alone to the place where I had 3 up my tent. I was tired 4 hungry. It was getting 5 and darker, and I was walking slowly 6 a narrow path. On my right was a wide river; on my left, a 7 , dark forest. All of a 8 , I saw two green eyes looking at me from among the trees. I knew it 9 be a man-eating tiger. The tiger was getting ready to 10 on me. My heart 11 . What could I do? Should I jump 12 the river and hope to save my life 13 swimming? I looked to the 14 . In the river there was a 15 crocodile waiting to welcome me with its mouth 16 open. I was so 17 that I shut my eyes. And I thought it would be the end of my 18 . I heard branches moving 19 the tiger roared (咆哮) and jumped. 20 then I opened my eyes. What do you think had happened? The tiger had jumped right over me and now in the jaws (嘴) of the crocodile. | ||||
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