单选题 It has been estimated that the earth's surface temperature has increased ______ one quarter to three quarters of a degree since 1805.
A. to B. by C. at D. with

【正确答案】 B
【答案解析】[解析] 增加或降低/减少了多少用介词by，增加到或降低/减少到多少用介词to，考生一定要区分清楚。类似用法的词还有：decrease，fall，drop，reduce，rise等。题句意为：“据估计，自从1805年以来地球表面的温度已经增加了0.25度到0.75度。”