问题
选择题
下列实例中，除哪项外，都是生态系统具有自动调节能力的典型实例[ ]
A．在森林中，当害虫数量增多时，食虫鸟类由于食物丰富，数量也会增多，这样，害虫种群的增长就会受到抑制
B．通过物理沉降、化学分解和微生物的分解，使轻度污染的水体得到净化
C．掠夺式开发使不少地区已成荒山秃岭
D．通过繁殖使火灾毁坏的树林得到恢复更新
答案
答案：C
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下列实例中，除哪项外，都是生态系统具有自动调节能力的典型实例[ ]
A．在森林中，当害虫数量增多时，食虫鸟类由于食物丰富，数量也会增多，这样，害虫种群的增长就会受到抑制
B．通过物理沉降、化学分解和微生物的分解，使轻度污染的水体得到净化
C．掠夺式开发使不少地区已成荒山秃岭
D．通过繁殖使火灾毁坏的树林得到恢复更新
答案：C
| 任务型阅读：中学生上网一直是备受关注的热点话题。某班就这一话题组织了一次主题班会。以下是几位同学的观点，请仔细阅读下面内容，完成信息记录卡。 | ||||||||
| Li Hua: Surfing the Internet is very exciting. We clan do lots of' things, such as playing games, listening to music, chatting with our friends and so on. I really enjoy it. Wang Gang: I like surfing the Internet, too. Be-cause I can learn a lot from it. I can get the latest news all over the world. I also can find the information I need so that l can spend less time on my homework. Zhang Jie :It's hard to say. I agree that the Internet is helpful to our study, but it's not right to spend too much time on the games. And some information on the In-ternet is bad for our mind and our eyes. In a word, we should use the Internet in a right way.
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