Recent studies have identified four major global environmental risks: acid rain, ozone de pletion, deforestation and the greenho

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问题 Recent studies have identified four major global environmental risks: acid rain, ozone de pletion, 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,鉴定,认出”。recognize意为“认出,承认”,prove意为“证明,检验”,get rid of意为“消除”,multiply意为“繁殖,增加”。本题句意:最近的研究已经确定了四种主要的全球环境风险:酸雨、臭氧损耗、森林砍伐和温室效应,故选A。
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