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27. I don’t agree with what you said, but I’ll keep it ________.

   A. in brain     B. on brain    C. on mind     D. in mind

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26. What the scientist said sounded strange, ______ they made sense.

   A. therefore     B. however    C. and so      D. and yet

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25.________ you go to Miss Liu, explain for me to her why I was late that day.

   A. Can       B. May     C. Would      D. Should

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24.________ no one in the house, the detective had to leave.

   A. There is    B. There was  C. There being  D. There to be

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23.In only 10 years, our province has been_______ into an advanced industrial province.

   A. transformed   B. entered   C. regarded    D. issued

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22.We still remember our teacher’s wishes during the graduation ____.

   A. ceremony    B. education   C. absorption   D. sign

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第一节:单项填空(共15小题,每小题1分,满分15分)

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

21.In our town apples are ______ most popular fruit while oranges come _______second.

   A. the, the    B. the,\     C.\, the     D. a, a

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31.(每空2分,共14分)我国自行研制的SARS疫苗为灭活疫苗,即利用甲醛处理SARS病毒使其变性,这是获得疫苗的常规方法。试回答相关问题。

  (1)组成SARS病毒的化学元素一定有         ;如果将该病毒置于培养基中,病毒不能增殖,其原因是        

  (2)下图为某健康成人注射SARS疫苗后机体抗体浓度变化图。若此人在注射疫苗后第15天又感染了该病毒,此时一般不会患病,原因是        

   (3)常规疫苗制备成本高,针头注射易感染接种者。有学者提出利用现有的基因工程技术,生产可食用疫苗克服常规疫苗所具有的弊端。其做法是首先获得SARS病毒的病原基因,将其导入植物细胞并进行表达,最终获得可食用的疫苗。完成以下问题:

     ①SARS病毒的抗原基因与运载体结合后,一般先导入农杆菌,通过农杆菌   

          植物的离体叶片,可将SARS病毒的抗原基因导入叶片细胞的细胞核,这样SARS病毒的抗原基因就有可能与植物的细胞核的基因组整合。

     ②将该叶片培养成转基因植株的技术是      ,是否成功获得转基因植物的标志是     

     ③基因工程获得的食用疫苗与常规疫苗相比虽然具有许多优点,但也存在一些缺点,请写出一例食用疫苗的缺点:     

 

贵州省兴仁一中2009年高中毕业班强化训练

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