26.一Thank God! It’s a fine day.The rain !
-But I don’t know how long it will stay fine.
A.is stopping B.has stopped C.stopped D.will stop
25. Whether ways will be found to help China _______ the current world financial crisis is just _______ worries the public.
A.prevent ;that B.survive ;what C.forbid; that D.quit ;what
24. ____for the people’s savement,the strong pig in the Wenchuan earthquake till now.
A.If it is not;can’t live B.Were it not:couldn’t live
C.Had it not been;couldn’t have lived D.If they were not;couldn’t live
23. The song You And Me _________ on the radio interests everyone.
A.playing B.played C.is played D.has been played
22. President Hu Jintao visited the museum of Xiaogang Village in Anhui in November, 2008.It was the first time that he _________ here .
A.came B.had come C.has come D.has been coming
第一节 单项选择(共15小题;每小题1分,满分15分)
21.Because of ______ high demand for Type AB blood, ______ supplies of it are usually limited.
A.the; the B./; / C./; the D.a; the
34.(8分)在低温下,将叶片置于研钵中研磨后,将叶细胞匀浆分级离心,结果如下图所示。请用P1-P4回答问题。
(1) DNA含量最多的是_______,因为____ ____。
(2)合成酶的结构在__________。
(3)给P2照光,有氧生成,说明P2主要是___ ___。
(4)能把葡萄糖彻底分解成CO2和H2 O的是__ ___。
(5)正常的植物细胞内,P1能合成___ __,P2能合成__ _, P4能合成_____ 。
33.(9分)概念图是一种能够比较直观体现概念之间关系的图示方法。请根据所学知识,完成相关的概念图。
(1)填写有关数字所代表的内容:
② ;④ ;⑥ 。
(2) ①和⑥基本组成单位分别是 和 ,
它们的不同是 。
(3)禽流感病毒是一种RNA病毒,为什么它的种类要比乙肝病毒(DNA病毒)要多?
(4)在动、植物细胞的 (填一种细胞器)中也有①物质,可以进行②③过程。
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