Recent studies have identified four major global environmental risks:acid rain,ozone depletion,deforestation and the greenhouse

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问题 Recent studies have identified four major global environmental risks:acid rain,ozone depletion,deforestation and the greenhouse effect.

选项 A、recognized
B、proved
C、got rid of
D、multiplied

答案A

解析 本题中,identify意为“识别,鉴别”。四个选项中,recognize意为“认可,承认”,如:recognize this new government(承认这个新政府)。prove意为“证明,检验”;get rid of意为“消除”;multiply意为“繁殖,增加”。只有A项符合题意。
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