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题型:阅读理解-阅读单选 难度:0.65 引用次数:84 题号:19504553

Nature is like the mechanism in an enormous clock. Everything is neatly arranged and inter connected. Every individual has its place and its function. Take the wolf for example. As meat-eaters, wolves regulate the number of plant eaters so that they do not multiply too rapidly. All animals and plants are held in a delicate balance.

The wolves remind me of a story from my childhood when my grandfather gave me an old clock. The first thing I did was take the clock apart to find out how it worked. Even though I was convinced that I knew how to put it back together in working order, I couldn’t do it. After I rebuilt it, there were a few cogs (轮齿) left over and a grandfather who was not in the best of moods. In the wild, wolves play the role of such cogs. If we remove them, not only do the enemies of sheep and cattle disappear, but the mechanism of nature also begins to run differently, so differently that rivers change course and many local bird species die out.

And things can also go wrong when a species is added. For example, the introduction of a nonnative fish leads to a massive reduction in the local deer population. Because of a fish? The earth’s ecosystems, it seems, are a bit too complex for us to draw up simple rules of cause and effect. Even conservation measures can have unexpected results. Who knew, for example, that recovering crane () populations in Europe would affect the production of Iberian ham?

So it’s high time we took a good look at the interconnections between species both large and small. It’s important for us to realize that even small interventions(介入)can have huge consequences, and we’d do better to keep our hands off everything in nature that we do not absolutely have to touch.

1. What does the underlined word “regulate” mean in paragraph1?
A.Control.B.Count.C.Record.D.Increase.
2. What does the author want to show with the story in paragraph 2?
A.Curiosity kills the cat.B.Grandfather’s love lasts.
C.Clocks are complex.D.Every part counts.
3. Why can things also go wrong when a species is added?
A.Local species die out due to the nonnative one.
B.Rules of cause and effect are obvious in nature.
C.The interconnections in nature are complicated.
D.Conservation projects are too hard to complete.
4. What does the author suggest people do?
A.Show mercy to small animals.B.Stay away from conservation.
C.Take a new look at meat-eaters.D.Think twice before stepping in.

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【推荐1】Tropical (热带的) forests could become so hot that some kinds of leaves will no longer be able to conduct photosynthesis (光 合 作用), according to a study. The photosynthetic machinery in tropical trees begins to fail at about 46.7℃ on average. The research suggests that forests may be nearing dangerous temperature sooner than expected. Models predict that once we hit a global temperature increase of 3.9℃, these forests might experience mass leaf damage.

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Researchers suggest that the damage is not yet unchanged. “Vote for people who are serious about addressing climate change and transferring to low-carbon economies, ”Disney, one researcher, advocated. More generally, we can all recognize the importance of supporting those countries and people who live in and rely on tropical forests economically, But the serious changes to tropical forests don’t just affect the local people it’s a global issue.

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“If you look the right way, you can see that the whole world is a garden.” These words come from the author of the book The Secret Garden, first published in 1911. At that time, only the very rich in Britain had gardens. Very soon after this, homes with gardens began to be built. This is what started the British love of gardening! Today, millions of Brits like to say that they have “green fingers”, with around half the population spending their free time gardening.

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