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本题添加时间:2023/4/3 12:59:00 |
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Everywhere man is altering the balance of nature. He is facilitating the spread of plants and animals into new regions, sometimes deliberately, sometimes unconsciously. He is covering huge areas with new kinds of plants, or with houses, factories, slag-heaps and other products of his civilization.He exterminates some species on a large scale, but favours the multiplication of others.In brief,he has done more in five-thousand-year to alter the biological aspect of the planet than has nature in five million.
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答案是:参考答案 8.人类到处都在改变着自然界的平衡。他帮助动植物进入新的地区,有时是有意的,有时是无意的。他正在用新的植物种类,或者用房屋、工厂、炉渣堆或其他的文明产物覆盖大的上地。他使有些物种大批消亡,却造成有利条件使另外一些物种成倍地増加。总之,人类在五千年内比大自然在五百万年内做了更多的事来改变地球的生态。
出自
英语(专升本) 江开系统
宁德师范学院
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