Compared to the last century,the Earth，s surface temperature has risen by about 1 degree centigrade today.As a matter of fact,we may feel that we can hardly put up with the much too hot summer and we can，t get used to warm winter.The rise of the Earth，s surface temperature has made much difference to human health,the existence of creatures and the balance of ecosystems.There is no doubt that human being，s activities are responsible for the bad environment.Conditions permitting,all countries in the world should spare no effort to improve our environment.Without all people，s joint efforts,what would our future be like？ 自主学习 1.But it is a rapid increase compared to most natural changes.(P26) 但是与其他自然变化比起来，它（气温）的变化是很快的了。 阅读下列句子,注意体会compare to/compare...with的意思。Compared to many poor students,she was lucky.(“与……相比”) We often compare teachers to gardeners.(把……比作) If you compare this book with that one,you，ll find many differences.(把A和B进行比较) ◆即学即练 用上述短语完成句子。 (1)她告诉她自己，和很多妇女比起来，她已经很幸运了。 She told herself that _____________ many women,she was already

　　very lucky. (2)莎士比亚把世界比做一个舞台。 _____________________________________________  (3)和他所拥有的比起来，这些邮票不是很有趣。 _____________________________________________  答案:(1)compared to

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