武汉重点中学2011届高三起点调研英语试卷及答案(7)

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武汉重点中学2011届高三起点调研英语试卷及答案(7)

  E

  Starving polar bears are eating one another in the Arctic. Flowers are blooming too soon and die. The ice caps are melting so fast that rising water levels will threaten coastal towns along Florida within several decades. These are just a few examples of the serious consequences of climate change supported by a new analysis in Nature.

  In the past three decades, average global temperatures have risen about 1 degree Fahrenheit (0.6 degree Celsius) and are projected to jump by about 3 degrees F (1. 7 degrees C) by the end of the century, says study lead author Cynthia Rosenzweig, who heads the Climate Impacts Group at NASA's Goddard Institute for Space Studies at Columbia University in New York City. "We've already seen that a relatively low amount of wanning," she says, "can result in a broad range of changes. "

  The unnatural warming caused by man-made greenhouse gases, especially carbon dioxide produced by cars and coal-powered plants, brings trouble for entire ecosystems. In North America alone, scientists have identified 89 species of plants, such as the American holly that have flowered earlier in the spring. In Spain, apple trees bloom 35 days ahead of schedule in response to the higher temperatures. Other wildlife, like the insects that use certain plants for food and the birds that feed on the insects, must then move forward their seasonal stirrings (萌动) and mating patterns to survive.

  To try to follow this time shift, some birds such as robins, the classic symbol of winter's thaw(解冻时期), are returning to Colorado from their migrations (迁徙) some two weeks earlier than in years past. All these changes can throw a food chain in disorder. Some bird species that arrive before the insects reappear may starve to death.

  "Around the world, plants and animals are waking up to an earlier alarm clock than they used to," says Terry Root, a biologist from Stanford University.

  67.What does the first paragraph mainly present to the readers?

  A.The survival of polar bears in the Arctic.

  B.The terrible situation for the coastal town along Florida.

  C.A brief description of what a warming world will look like.

  D.A new analysis of climate change in Nature.

  68.According to the passage, what has happened to plants as a result of warming climate?

  A.Many species of plants have died out.

  B.Some flowers have appeared ahead of rime.

  C.Apple trees have produced less fruit.

  D.Plants have provided no food to birds.

  69.What can be learnt about robins from the passage?

  A.They are good at telling the direction.

  B.They can predict the change of weather.

  C.They usually come back when spring comes.

  D.They have to move away for cool weather.

  70.What does the passage mainly tell us?

  A.Man-made warming changes natures clock.

  B.Global warming is unavoidable.

  C.Both plants and animals will change.

  D.People need to adapt to climate change.

 

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