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
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
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
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
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
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
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)
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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