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    . The big snow lasted nearly half a week. What was worse, they were trapped in the mountain and badly ________ food.

    A．in search ofB．in the hope ofC．in want ofD．in charge of

    C

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    WASHINGTON—Two-thirds of the world’s polar bear population could be gone by 2050 if predictions of melting sea ice hold true, the US Geological Survey reported on Friday.

    The fate of polar bears could be even worse than that estimate, because sea ice in the Arctic might be disappearing faster than the available computer models predict, the geological survey said in a report aimed at determining whether the big white bear should be listed as a threatened species.

    “There is a definite link between changes in the sea ice and the welfare of polar bears,” said Steve Amstrup, who led the research team. He says Arctic sea ice is already at the lowest this year and is expected to retreat(退却) farther this month.

    That means that polar bears—some 16,000 of them -- will disappear by 2050 from parts of the Arctic where sea ice is melting most rapidly, along the north coasts of Alaska and Russia, researchers said in a telephone briefing(简报).

    Other polar bears could survive beyond that date but many of those could be gone by 2100, Amstrup said. By this century’s end, the only polar bears left might live in the Canadian Arctic islands and along the west coast of Greenland.

    “It is likely to result in loss of approximately two-thirds of the world’s current polar bear population by the mid 21st century,” the report’s executive summary said.

    “Because the observed trajectory(轨迹)of Arctic sea ice decline appears to be underestimated by currently available models, this assessment of future polar bear status may be conservative(保守的).”

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    1.What was the US Geological Survey intended to do?

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    B. To measure how fast the sea ice melts in the Arctic.

    C. To check the predictions of the computer models.

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    科目：高中英语 来源：2012-2013学年广东省高三2月月考英语试卷（解析版） 题型：信息匹配

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    根据文章内容，从方框A-F选项中，选出每一段的小题或能概括主题思想的最佳选项，选项中有一项为多余选项。

    A. The Introduction of Paris

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    C. The Population Growth in Paris

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