0  323736  323744  323750  323754  323760  323762  323766  323772  323774  323780  323786  323790  323792  323796  323802  323804  323810  323814  323816  323820  323822  323826  323828  323830  323831  323832  323834  323835  323836  323838  323840  323844  323846  323850  323852  323856  323862  323864  323870  323874  323876  323880  323886  323892  323894  323900  323904  323906  323912  323916  323922  323930  447090 

29. --- Have you done your homework? --- Not yet. I didn't have time last night. --- _______

  A. Why not?     B. That's no excuse.  C. Not at all.    D. No problem.

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28. _____ more about the history of the country, just read these books and talk with the old people there.

  A. Know       B. Knowing     C. Known     D. To know

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27. It's a very hot place. Sometimes the temperature ______ reach 40 degrees C in the summer.

  A. shall       B. must       C. can      D. should

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26. It is difficult for a child to learn a language in a family, in which ______ of the parents speaks the language.

  A. both        B. all       C. each      D. neither

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25. One of his final public appearances was at the Berlin International Film Festival in February, where he _____ a lifetime achievement award.

A. repeated      B. represented    C. reached     D. received

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24. There are many differences in the language, and these differences are ______ make the language so colorful.

  A. that        B. what       C. which     D. who

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23. She feels ______ because the other children don't play with her.

  A. got out      B. left out      C. stood out    D. gave out

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22. Now it is easy for us to get _____ information we need from ______ Internet.

 A. the, the        B. /, the      C. /, /       D. the, /

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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,并将答案写在答题卡上。

21. --- Please give me that book. --- ________ --- To have a look at it. A. Here you are.    B. What for?     C. Really     D. What if

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38、(14分)

 Ⅰ、(6分)下面是真核生物染色体组成的概念图,请写出1-6的名称

 

  1           2             3         

  4           5             6         

 

 Ⅱ、(8分)⑴果蝇的灰身和黑身受一对等位基因控制,位于常色染色体上;果

  蝇的红眼和白眼也受一对等位基因控制,位于X染色体上。下表是实验结果:

P
灰身(♀)×黑身(♂)
红眼(♀)×白眼(♂)
F1
灰身
红眼
F2
灰身∶黑身=3∶1
红眼∶白眼=3∶1

①试判断F2中红眼、白眼果蝇的性别分别是_________和_________。

②现用纯合的灰身红眼果蝇(♀)与黑身白眼果蝇(♂)杂交,让F1个体间杂交得

 F2。预期F2可能出现的基因型有__________种,雄性中黑身白眼果蝇出现的

 概率是__________。

⑵科学家摩尔根用纯种灰身残翅果蝇与黑身长翅果蝇交配,所获子代(F1)全部

 为灰身长翅果蝇,请你运用一种最简便的方法来判断果蝇灰身和黑身、长翅

 和残翅的遗传行为是否遵循基因的自由组合定律。

 实验方法:

 

 

 

 

 结果预测及结论:

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