0  334812  334820  334826  334830  334836  334838  334842  334848  334850  334856  334862  334866  334868  334872  334878  334880  334886  334890  334892  334896  334898  334902  334904  334906  334907  334908  334910  334911  334912  334914  334916  334920  334922  334926  334928  334932  334938  334940  334946  334950  334952  334956  334962  334968  334970  334976  334980  334982  334988  334992  334998  335006  447090 

25. “Attention, please. Whoever can answer one of my questions______ receive a prize”, the teacher

said in class.

A. might            B. shall            C. should              D. would

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24. - ______you write so well?

  -By reading and keeping diaries every day.

A. How is it             B. What is it       

C. How is it that         D. What is it that

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23. ______the website of the Fire Department in your city, and you will learn a lot about firefighting.

A. Having searched       B. To search        C. Searching        D. Search

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22. -I called you many times yesterday morning, but I couldn’t get through.

-Oh. My brother ______on the phone all the time!

A. was talking           B. has been talking      C. has talked        D. talked

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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。

例:It is generally considered unwise to give a child ________ he or she wants.

A. however         B. whatever         C. whichever           D. whenever

答案是B。

21. -Would you mind if I closed the window?

-______. It’s that cold outside.

A. Sorry, I’m afraid       B. Yes, help yourself

C. Sorry, you don’t       D. No, go ahead

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27.(1)生殖隔离

(2)脱氧核苷酸(碱基)排列顺序(或遗传信息)   一套密码子

(3)5   1∶4∶6∶4∶1

 

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26.Ⅰ.(1)下降   低

(2)[H]和ATP(缺一、错一不得分)

(3)CO2浓度   O2浓度

(4)氧浓度的变化   光照强度、温度(答出一点即可)   左   减慢

Ⅱ.下丘脑   甲状腺   骨胳肌收缩   皮肤毛细血管收缩(每空2分)

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25.(1)m=20.0,n=20.0(各1分,共2分)

(2)4.5×10-4‑mol/L·min(3分)

(3)①1.4min (2分) ②1,1(各1分,共2分)

(4)①降低 (2分)

②2Fe3++2I-=2Fe2++I2  2Fe2++H2O2+2H+=2Fe3++2H2O(各2分,共4分)

(5)水浴加热(或其他合理答案如:过氧化氢不加热只加热其他试剂)(2分)

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同步练习册答案