prep破解版 请教大家

Sophin

According to scientists at the University of Alaska

, while the surface temperature of the globe has risen over the last century by about one degree Fahrenheit, the surface temperature in Alaska, Siberia, and northwestern Canada has increased in the previous thirty years by about five degrees.

B

(A) the surface temperature in Alaska, Siberia, and northwestern Canada

has increased in the previous thirty years by about five degrees

(B) the surface temperature in Alaska, Siberia, and northwestern Canada

has increased over the last thirty years by about five degrees

(C) there was an increase in the last thirty years by about five degrees in Alaska, Siberia, and northwestern Canada

(D) it had increased in Alaska, Siberia, and northwestern Canada

by about five degrees over the previous thirty years

(E) it has increased in Alaska, Siberia, and northwestern Canada

over the previous thirty years by about five degrees
为什么the surface...不可以用it代替呢？请教大家

aeoluseros

it是完全指代，只能指代the surface temperature of the globe，如果用it指代就成了the surface temperature of the globe in Alaska, Siberia, and northwestern Canada逻辑错误

Sophin

谢谢。。。解释的很具体。。。

白冬冬

it是完全指代，只能指代the surface temperature of the globe，如果用it指代就成了the surface temperature of the globe in Alaska, Siberia, and northwestern Canada逻辑错误

-- by 会员 aeoluseros (2011/2/9 17:19:06)

aeoluseros 版主，it完全指代是什么意思？能细讲一下吗？多谢啦！