问题
名词解释
易感人群
答案
参考答案：当环境发生改变或环境中有害因素发生作用时，人群对此的反应存在着差异。通常将这类对环境有害因素作用的反应更为敏感和强烈的人群称为易感人群。
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易感人群
参考答案：当环境发生改变或环境中有害因素发生作用时，人群对此的反应存在着差异。通常将这类对环境有害因素作用的反应更为敏感和强烈的人群称为易感人群。
| 阅读填空。从方框中选择单词，带入短文空格内，使短文意思正确、通顺，再将其适当形式填入短文 后的横线上。每词限用一次。 | |
uniforms every day. The 1______ is that all my classmates think the uniforms are 2______. We think young people should look smart and we would like to wear our own clothes. Our 3______ believe that if we did that, we would concentrate more on our clothes than our studies. We disagree. We would 4______ more comfortable and that is good for studying. If we can't do that, we should be allowed to design our own uniforms. That would be a good way to keep 5______ teachers and students happy. It's also probably a good idea for parents to 6______ teenagers to study in groups during the evening. I know we get noisy sometimes, but we learn a lot 7______ each other. We also think that vacations should be 8______.At present they're too short. Longer vacations would give us time to do things like volunteering. Last summer I 9______ an opportunity to volunteer at the local hospital, but I couldn't 10______ I had to go back to school. It would be a good experience for me because I want to be a doctor when I'm older. |