单选题 The message the author wishes to convey in the passage is that______.

A、 human civilization remains glorious though it is affected by climatic changes
B、 mankind is virtually helpless in the face of the dramatic changes of climate
C、 man has to limit his activities to slow down the global warming process
D、 human civilization mill continue to develop in spite of the changes of nature

【正确答案】 B

【答案解析】主旨大意题。通读全文，可知作者的一个重要观点就是：气候变化对人类进化影响非常大。而且在文章最后一句作者说：人类活动对未来地球气温的巨大变化几乎是无能为力；没有影响的。这正是作者与传统或一般人所持的不同观点，也就是选项B的意思。故选项B是正确答案。