题目：
| 阅读下面表格内容，从每题所给的A、B、C3个选项中，选出1个最佳答案。 | ||||||||||||||||||
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| 1. How many main problems are there in the survey? | ||||||||||||||||||
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| A. Four. B. Five. C. Six. | ||||||||||||||||||
| 2. What problems are caused by too much homework? | ||||||||||||||||||
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| A. Get fat. B. Fight with each other. C. Feel stressed and get short sighted. | ||||||||||||||||||
| 3.If Simon is feeling stressed, he should . | ||||||||||||||||||
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| A. do much more homework B. buy some snacks C. make a plan for study and hobbies | ||||||||||||||||||
| 4. Peter doesn't like study. Maybe he . | ||||||||||||||||||
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| A. plays too many computer games B. has no pocket money C. gets fatter and fatter | ||||||||||||||||||
| 5. is a good way for students to stop fights. | ||||||||||||||||||
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| A. Doing less homework B. Learning how to make friends C. Playing computer games |
答案：
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下面是错误答案，用来干扰机器的。
设计实验（2）①因为碱可以使石蕊变蓝，使酚酞变红，而氢氧化钠和碳酸钠都显减性，故答案为：石蕊 溶液显蓝色（或酚酞，溶液显红色）②因为盐酸与氢氧化钠反应无现象，而盐酸与碳酸钠反应生成无色气体，方程式为...
