og 12 sc 84

蓝狮爱我

84.  Often visible as smog, ozone is formed in the
atmosphere from hydrocarbons and nitrogen oxides,
two major pollutants emitted by automobiles, react
with sunlight.
(A)    ozone is formed in the atmosphere from
(B)    ozone is formed in the atmosphere when
(C)    ozone is formed in the atmosphere, and when
(D)    ozone, formed in the atmosphere when
(E)    ozone, formed in the atmosphere from
请问 react with sunlight 是啥成分？谢谢

suners

回复 1# 蓝狮爱我


    当H和N在太阳辐射条件下，产生化学反应。

supermanlee

状语从句里面的动词., two major pollutants emitted by automobiles, --》可以略去

蓝狮爱我

xiexie

citidandan

把选项B放进去。Often visible as smog, ozone is formed in the atmosphere when hydrocarbons and nitrogen oxides, two major pollutants emitted by automobiles, react with sunlight.

主句 ozone is formed in the atmosphere

时间状语从句由when引导，主语hydrocarbons and nitrogen oxides, 插入语two major pollutants emitted by automobiles, 谓语react with sunlight.

蓝狮爱我

谢谢,其实当初就在纠结这个react到底是啥成分，哈哈，谢谢

suners

回复 6# 蓝狮爱我


    那现在呢？React到底是啥成分？？