第二节:听下面6段对话或独白。每段对话或独白后有几个小题,从题中所给的A,B,C三个选项中选出最佳选项,并标在试卷的相应位置。
听第6段材料,回答第6至7题。
6. What does the man want on his pizza?
A. Ham and pineapple. B. Bacon and tomatoes. C. Sausage and mushrooms.
7. At what time does this conversation take place?
A.4:45. B. 5:15. C. 5:00
听第7段材料,回答第8至10题。
8. What's the relationship between the two speakers?
A. Headmaster and teacher. B. Assistant and customer. C. Boss and employee.
9. What does the man think of the woman's first request?
A. It's unbelievable. B. It's unacceptable. C. It's reasonable.
10. What will happen to the woman if she insists?
A. She will have to find a new job.
B. She will work fewer hours a week.
C. She will get what she asks for.
听第8段材料,回答第11至12题。
11. Why did the man buy his niece some fish?
A. Because they had beautiful colors.
B. Because the girl only liked fish.
C. Because they were easy to take care of.
12. What's the man's name?
A. Jeff. B. Jack. C. Jeffish.
听第9段材料,回答第13至15题。
13. What does the woman want to buy?
A. A bag B.A Pair of shoes. C. A sweater.
14. What can we learn about the woman from the conversation?
A. She will go to another shop.
B. She prefers blue to green.
C. She is really good at bargaining.
15. How much does the woman spend at last?
A. $54. B. $52. C. $50. TO
听第10段材料,回答第16至17题。
16. What's the trouble with the woman?
A. She was walking in the opposite direction.
B. She was making a wrong turn.
C. She was mistaking Broadway as Bakery.
17. What will probably happen after the conversation?
A. The man will take the woman to the place.
B. The woman will get lost again.
C. The woman will find the place.
听第11段材料,回答第18至20题。
18. What is the talk mainly about?
A. The entertainment awards.
B. The Nobel Prizes.
C. People's Choice Awards.
19. In some people's opinion, what draws more attention in the ceremonies?
A. What the winners say. B. What the winners wear. C. What the winners show.
20. What can we learn about the speaker?
A. She is interested in the pre-show.
B. She is not interested in all the award shows.
C. She is interested in what the stars will say.
36.(7分)某时期,长江中下游地区的大块农田发生稻化螟虫害,承包土地的农民起初在稻田里喷洒DDT家药,但几年后又不得不以放养青蛙来代替喷洒农药。如图为在此时期内稻化螟种群密度变化示意图,分析回答:
(1)从A点到B点,在施用杀虫剂的初期,害虫种群密度都急剧下降,但仍有极少数个体得以生存,原因是____________。
(2)从B点到C点曲线回升的原因是__________________________。在这个过程中,农药对害虫起_________作用,这种作用是___________(定向或不定向)的,是通过农药与害虫之间的____________实现的,
(3)一般认为,C到E点为生物防治期,请根据曲线对比两种治虫方法,可以看出农药防治害虫的缺点是______________________________。
(4)如果A到D为农药防治期,这说明在C点时,农民在使用农药时可能采取了某种措施,这种措施最可能是____________________________________。
35.(6分)科学家将使啤酒产生丰富泡沫的LTP1基因植入啤酒酵母菌中,使其产生LTP1蛋白,酿出泡沫丰富的啤酒,具体的操作过程如下图所示。(注:所用限制性内切酶的识别序列和切点是-G↓GATCC-)
(1)图中所示的基因工程操作过程的A和C分别是_____________、______________。
(2)由图中可以看出所用的运载体B是__________。
(3)请画出LTP1基因被限制酶切割后所形成的黏性末端:______________________。
LTP1基因和B重组成C还需要什么工具?______________。
(4)如何检测LTP1基因在啤酒酵母菌中的表达?________________________。
34.(7分)右图展示了现代小麦的起源过程。据图回答下列问题:
(1)假如该过程表示一种育种方法,这种
方法称为 。
(2)杂交种F1 (是或不是)一个新的物种, 原因是 。
(3)杂交种F2不育的原因是 。
(4)最后形成的小麦 (是或不是)一种新物种,它与一粒小麦杂交形成的后代的生殖能力怎样? 这说明它们之间已经形成了 。
33.(4分)右图纵轴表示青霉菌的菌株数,横轴表示青霉菌产生的青霉素产量,曲线a表示使用诱变剂前菌株数与产量之间的变化,曲线b、c、d表示使用不同剂量的诱变剂后菌株数与产量之间的变化。请根据图回答:
(1)从曲线a可以看出青霉菌中存在不同变异类型的个体,有的产生青霉素多,有的产生青霉素少。引起这种变异的主要来源是 。
(2)曲线b和a相比,说明了 。
(3) 比较b、c、d 3条曲线的变化,最符合人们的菌株是 ,b、c、d 3条曲线比较,说明了 。
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