Scientists generally agree that the 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.so long asB.as much asC.as long asD.as well as在线课程B
解析:
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。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。
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