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27.Do not start a book unless you can see from the first few pages that it is ___ you can easily read and understand.

     A.that      B.the one       C.one    '   D.a one

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26.A survey showed that women in Hong Kong were more romantic, with 34.3 percent of them ___ that love counted the most.

     A.believing       B.believe       C.believed          D.to believe

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25.Here you are, Tommy.You ___ to take it.I was going to send it to you.

     A.needn't have come            B.didn't need to come

     C.don't need to come           D.needn't come

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24.It was not until then that I came to know that knowledge ___ only from practice.

     A.had come         B.comes        C.came      D.has come

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23.During Chang'e-2 Satellite's flight to the Moon, it ___ adjusts its direction so that it can go into its programmed orbit.

     A.eventually                         B.gradually   

     C.constantly                         D.continuously

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22.They have their reasons for keeping their marriage___ secret for ___ moment.

     A.the; a       B./;the             C.a; the                       D.a; a

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第一节:语法和词汇知识(共l5小题;每小题l分,满分l5分)

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

21.-Could we put off the meeting?

     -___. This is the only day everyone is available.

     A.Not likely       B.Not exactly       C.Not nearly     D.Not really

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44.(16分)请同答下列有关遗传学的问题

I(1)孟德尔选取豌豆作为杂交实验的材料,主要是因为            

                    

  (2)基因型为RR的豌豆表现为圆粒的原因是它合成较多的支链淀粉,从而能够有效保

留水分,这说明基因、蛋白质与性状的关系是           

  (3)摩尔根从野生果蝇培养瓶中发现了一只白眼雄性个体。他将该白眼雄果蝇与红眼雌果蝇杂交,F1全部表现为红眼。再让F1红眼果蝇相互交配,F2性别比为1:1,红眼,占3/4,但所有雌性全为红眼,白眼只限于雄性。请用遗传图解解释该现象(显性基因用A表示,隐性基因用a表示)。

II体色是划分鲤鱼品种不检验其纯度的一个重要指标。不同鲤鱼品种的体色不同,是由于鱼体鳞片和皮肤含有不同的色素细胞及其数量分布差异所致。科研人员用黑色鲤鱼(简称黑鲤)和红色鲤鱼(简称红鲤)杂交,F1皆表现为黑鲤,F1自交得F2,结果如表2所示,请回答下列问题。

表2

取样地点
取样总数
F2性状的分离情况
黑鲤
红鲤
黑鲤:红鲤
1号池
1699
1592
107
14.88:1
2号池
62
58
4
14.50:1

  (1)鲤鱼体色中的         是显性性状。

  (2)分析实验结果推测:鲤鱼的体色是由     对基因控制的,该性状的遗传遵循

                   定律。

  (3)为验证上述推测是否正确,科研人员又做了如下实验:

①选择纯合黑鲤和纯合红鲤做亲本杂交获得F1

                        

                       

预期结果                     

  (4)如果____与   相符,说明上述推测成立。

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