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Scientists generally agree that Earth's ...

Scientists generally agree that Earth's climate will warm up over the next 50 to 100 years __________ it has warmed in the 20,000 years since Ice Age.

A.as long as B.as much as

C.as soon as D.as well as

 

B 【解析】 考查副词辨析。句意:科学家普遍认为,在未来的50年到100年间,气候将要变暖,其幅度相当于自冰川期至现在2万年间的气候变化。A.as long as和……一样长;B.as much as和……一样多;C.as soon as一……就……;D.as well as和……一样好。这是一个表示同级比较的比较状语从句,因比较的对象是上升的温度,所以B项最佳。  
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