2. 外语
  3. It has been estimated that the earth’s surface temperature has increased ______ one quarter to three quarters of a degree since

It has been estimated that the earth’s surface temperature has increased ______ one quarter to three quarters of a degree since

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问题 It has been estimated that the earth’s surface temperature has increased ______ one quarter to three quarters of a degree since 1850. ~
选项 A、to
B、by
C、at
D、with
答案B
解析 此题考查动词与介词的固定搭配。据估计自1850年以来地表温度增长了1/4到3/4度。increase by 是固定用法，意为“增长了”。by后跟具体的数据，其余三个介词都不与increase搭配。
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