上完体育课后，小明感到又热又渴，他买了一罐“健力宝”饮料，拉

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问题填空题

上完体育课后，小明感到又热又渴，他买了一罐“健力宝”饮料，拉开瓶盖，看到有大量的泡沫溢出，原因是______，他赶紧喝了几口后，禁不住打了几个嗝，感到凉爽多了．他打嗝的原因是______．

答案

拉开瓶盖，看到有大量的泡沫溢出是因为瓶内的压强减小，CO₂的溶解度减小，从饮料中逸出．

打嗝的原因是，饮料喝进肚里后温度升高，CO₂的溶解度减小，从饮料中逸出．

故答案为：压强减小，CO₂的溶解度减小；温度升高，CO₂的溶解度减小．

填空题

单词拼写: 请根据汉语提示,结合句子意思填写单词,注意单词的形式变化.

1. Don't be (泄气)! If you put your heart into your study, you'll make great progress.

2. What's your (态度) towards playing computer games?

3. When I said I was faster, she (挑战) me to a race.

4. I think (质量) is more important than quantity for the job.

5. He agreed to (陪伴) me to the park this afternoon.

6. Liu Mei studied hard and won a (奖学金) to Oxford.

7. A lot of buildings were (摧毁) in the powerful earthquake that happened in March.

8. To be an (优秀的) student, you must study hard and use proper methods.

9. It's (难以置信的) that a 14-year-old girl could break the high jump record.

10. There are (优势) for students to surf the Internet.

单项选择题

某服务器软件系统能够正确运行并得出计算结果，但存在“系统出错后不能在要求的时间内恢复到正常状态”和“对系统进行二次开发时总要超过半年的时间”两个问题，上述问题依次与质量属性中的（）相关。

A.可用性和性能

B.性能和可修改性

C.性能和可测试性

D.可用性和可修改性