OG12 SC84

girlwithwings · 发表于 2010-3-7 13:52:20

ozone is formed … when hydrocarbons and nitrogen oxides, … , react …

B ：ozone is formed … when

C : ozone is formed … , and when

B & C's difference is ",and" , and the explaination of OG is

that C "and when " distorts the meaning , suggesting that ozone is formed in 2 ways.

可是我觉得2者还是差不多啊？谁能给我更具体的解释呢？

云南 · 发表于 2010-7-15 16:08:29

楼主这样的话，就会改变原来的句意，原文只是一个条件句，如果选C的话，那么when和谁并列呢

girlwithwings · 发表于 2010-3-8 11:32:36

但不排除可以省略相同的主谓啊，比如

ozone is formed … and (it is formed) when hydrocarbons and nitrogen oxides, … , react …

sissihong · 发表于 2010-3-7 19:35:26

我觉得一般来说除了平行对称之外，and后面一般都是整句话啊。。。

果汁软糖 · 发表于 2010-3-7 16:13:54

最好是把全部的题干都贴出来这样不太能判断

zhaoyiqing · 发表于 2010-3-7 14:07:29

and when无平行对象。。

OG12 SC84

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