语文部分有一篇阅读是三十六套最后两个section中的一个，讲什么clouds，
As of the late 1980's. neither theorists nor large-scale
computer climate models could accurately predict
whether cloud systems would help or hurt a warming
globe. Some studies suggested that a four percent increase
in stratocumulus clouds over the ocean could compensate
for a doubling in atmospheric carbon dioxide, preventing
a potentially disastrous planetwide temperature increase.
On the other hand, an increase in cirrus clouds could
increase global warming.
That clouds represented the weakest element in climate
models was illustrated by a study of fourteen such models.
Comparing climate forecasts for a world with double the
current amount of carbon dioxide, researchers found that
the models agreed quite well if clouds were not included.
But when clouds were incorporated, a wide range of
forecasts was produced.
就是这篇，但是题目不一样，题目忘了。。。