补充题96,D和E有什么区别?

eric123

补充题96.  (420) There is substantial evidence that certain forms of solar energy either now or within a few years will be economically competitive with conventional sources of heat and power.

(A) either now or within a few years will be economically competitive with conventional sources of heat and power

(B) will either be economically competitive with conventional sources of heat and power within a few years or are so now

(C) will be economically competitive with conventional sources of heat and power either now or within a few years

(D) either are now economically competitive with conventional sources of heat and power or will be so within a few years（D）

(E) are either now or will be within a few years economically competitive with conventional sources of heat and power

D和E有什么区别?

LuckiPanda

E的结构是are A or B, 即 are either now, or are will be，是个错误结构
D没有这个问题

LuckiPanda

哪儿的补充题？是指的新东方以前的老五册上的吗，thanks

eric123

大全250补充题啊

LuckiPanda

请问再哪里下载啊？没搜到，置顶下载贴里也没有

eric123

give me your email, I'll send you.

LuckiPanda

luckipanda(A) hotmail.com
thank you

HHB

以下是引用eric123在2007-8-1 5:54:00的发言：

补充题96.  (420) There is substantial evidence that certain forms of solar energy either now or within a few years will be economically competitive with conventional sources of heat and power.

(A) either now or within a few years will be economically competitive with conventional sources of heat and power

(B) will either be economically competitive with conventional sources of heat and power within a few years or are so now

(C) will be economically competitive with conventional sources of heat and power either now or within a few years

(D) either are now economically competitive with conventional sources of heat and power or will be so within a few years（D）

(E) are either now or will be within a few years economically competitive with conventional sources of heat and power

D和E有什么区别?

either x or y，x和y要平行。

D平行，E不平行。