1、2008年1月12日我国科考队员成功登上了南极“冰盖之巅”。此时在他们生理上出现的适应性变化是：　　　　　　　　　　　　　　 (　　 )

①体温下降　 ②机体耗氧量降低　 ③皮肤血管收缩

④体温调节中枢兴奋性增强　　　　 ⑤甲状腺激素分泌量增加

A.①③④　 B.①④⑤　 C.②③⑤　 D.③④⑤

22．(4分)________________________________________________________________

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21．(4分)________________________________________________________________

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20．(3分)________________________________________________________________

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19．(8分)

(1)_________________________、___________________________

(2)_________________________、___________________________

(3)_________________________、___________________________

(4)_________________________、___________________________

17．(10分)

(1)____________________________________________________________________

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(3)____________________________________________________________________

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(1)____________________________________________________________________

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(2)____________________________________________________________________

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19、古诗文默写。(8分)

(1)__________________，__________________，后之视今，亦犹今之视昔。(《兰亭集序》)

(2)我闻琵琶已叹息，又闻此语重唧唧。__________________，__________________。(《琵琶行》) 　　 (3)莫道不销魂，__________________，__________________。(《醉花阴》)

(4)__________________，__________________；雁阵惊寒，声断衡阳之浦。(《　滕王阁序》)