[提问]ron的比较观点的讨论，到底如何理解？

深高金的zkk

首先是Ron对gas prices were higher in 2007 than those in 1997.的分析，这句话是错误的。因为比较的右半部分those(gas prices) in 1997，在比较的左半部分没有找到相对应的结构gas prices in 2007。以下提供Ron的原话。

gas prices were higher in 2007 than those in 1997.

1/

right-hand element = "[gas prices] in 1997"

(meaning of the pronoun is obvious, i hope)

2/

we want to compare prices, so the set-up is ok

3/

nothing works on the other side. we need "gas prices in 2007" (in one piece), but only "gas prices" is there.

nope.

然而！"gas prices were higher in 2007 than those in 1997"  是错误的为什么OG上有一道 "Prices at the x level are only 2.5 percent higher now than those of a year ago" 是正确的呢？既然这个属于绝对错误，应该会被排除才对。

长丝弓

以下讨论供你参考：

https://forum.chasedream.com/thread-1326395-1-1.html

owen在杭州

OG那个解释其实是有问题的，按照Ron的说法OG那个选项的排除点并不是比较对象不对等。