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21. This article may shock some sensitive readers,      I offer my apologies in advance.

   A. from whom   B. for whom    C. to whom    D. towards whom

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20. -Where will you start your work after graduation? 

一It’s not been decided yet. I      continue my studies for a higher degree.

    A. need            B. would            C. might            D. must

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19. One can be strong, brave and faithful after all these hardships he has ________.

  A. looked through  B. got through   C. put through  D. gone through

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18. Choosing the right dictionary depends on ______ you want to use it for.

A. why   B. what   C. how   D. whether

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17. - I have heard you are going to change your job. Are you serious?

-_______. I will quit my job.

A. Yes, I’ve made up my mind      B. No, I was joking     

C. Yes, I do hope so           D. No, I’m not

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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。 

16. We are now living in ______ “Information Age”, ______ time of new discoveries and great changes.

  A. the; a  B. an; the  C. 不填; a  D. the; the

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47.(11分)植物表现出的顶端优势--植物的顶芽优先生长而侧芽受到抑制的现象,就是因为顶芽产生的生长素向下运输,大量地积累在侧芽部位,使侧芽的生长受到抑制的缘故。

为了验证“植物顶芽产生的生长素能抑制侧芽的生长”,请根据所给的材料和用具设计实验:

材料和用具:生长状况相同的柳树幼苗若干,不含生长素和含生长素的羊毛脂,剪刀等。

(1)实验步骤:

                                    

                                    

                                     

(2)实验结果是:                             

                                       

(3)实验结论:                             

                                        

辽宁省锦州市2010届高三上学期期末考试

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46.(9分)如图是一个食物网简图,请据图回答下列问题:

(1)此食物网中有     条食物链。图中的        是生产者,猫头鹰所占的营养级是       

(2)猫头鹰和蛇的关系是       

(3)该食物网再加上________和__________就可以构成一个完整的生态系统。

(4)生态系统的功能是_____________、___________和_____________。

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