A-A+
It has been estimated that the earth's surface
问题详情
It has been estimated that the earth"s surface temperature has increased______ one quarter to three fourths of a degree since 1850.
A．by
B．at
C．to
D．with请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：应该掌握选择项中四个介词的不同用法，修饰数字的介词一般为“by”，所以A项正确。全句意思为“据估计，从1850年以来，地表温度增加了0.25°到0.75°”。
