题目：
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| If you often have a cold, headache or backache, there is something wrong with your health. Eating healthy food 1 good for our health. Tofu (豆腐), milk, vegetables are healthy for us. Tofu is a kind of traditional (传统的) 2 food. We often 3 it in China. Now more and more people 4 other countries think tofu is good for health, 5 . They also like eating it. Milk is 6 kind of health food. Every day you should 7 one or two glasses of milk. It can 8 us strong. Vegetables are very important. You should eat 9 them. There are vitamin (维他命) A, B, C, D, E and so on in them. As we know, it's important 10 a balanced diet (均衡饮食). We must have the right kinds of food. We should also eat some pork, chicken and beef. We should eat more fruit and vegetables but less meat. | ||||
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答案：A题目分析：2011年11月，我国环保部发布的《环境空气质量标准》，基本监控项目增设了PM2.5浓度限值，而选项中的另三项，以前就有。故选A点评：空气的污染是社会关注的焦点问题，因此与之相关的问题也就成为...
