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考满分TOEFL: 小黑人

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截止昨天,已经有 252988 同学完成了 4103155 次的练习

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第1段

1 .Now listen to part of a lecture on the topic you just read about.

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第2段

1 .None of the methods proposed in the reading offers a practical solution for slowing down the decline in frog populations.

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2 .There are problems with each of the methods you read about.

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第3段

1 .First, seriously reducing pesticides in agricultural areas with threatened frog populations is not economically practical or fair.

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2 .Farmers rely on pesticides to decrease crop losses and stay competitive in the market.

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3 .If farmers in areas that are close to endangered frog populations have to follow stricter regulations regarding pesticide use, then those farmers would be at a severe disadvantage compared to farmers in other areas.

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4 .They would likely lose more crops and have a lower yield than competing farms.

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第4段

1 .Second, the new treatments against the skin fungus you read about?

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2 .Let me explain a couple of problems with this plan.

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3 .The treatments must be applied individually to each frog.

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4 .And so using them on a large scale is extremely difficult.

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5 .It requires capturing and treating each individual frog in a population.

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6 .Moreover, the treatments do not prevent the frogs from passing the fungus onto their offspring.

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7 .So the treatments would have to be applied again and again to each new generation of frogs.

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8 .So applying these treatments would be incredibly complicated and expensive.

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第5段

1 .Third, while it's a good idea to protect lakes and marshes from excessive water use and development, that will not save frog populations.

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2 .You see, water use and development are not the biggest threats to water and wetland habitats.

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3 .The real threat is global warming.

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4 .In recent decades, global warming has contributed to the disappearance of many water and wetland habitats, causing entire species to go extinct.

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5 .Prohibiting humans from using water or building near frog habitats is unlikely to prevent the ongoing habitat changes caused by global warming.

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