题目内容
5.Researchers in the US say they might have discovered how to fight against and even reverse some processes of ageing,at least in mice.Injecting the blood of young mice into the older ones improved their brainpower,a study found.Scientists at Stanford University plan to carry out trials in people in the hope that new treatments for dementia(痴呆症) can be developed."There are factors present in blood from young mice that can recharge an old mouse's brain so that it functions more like a younger one,"says Dr.Tony from Stanford University School of medicine.In the study published in Nature Medicine,mice aged 18months were given injections of the blood taken from mice aged 3months.The injected mice performed better on memory tests than mice of the same age that had not been given the blood.Dr.Tony said it was not known whether the same was true of humans,but a trial was planned.
A research center in UK said the treatment restored certain aspects of learning and memory in mice,but was of unknown importance to humans.The research,while very interesting,did not test the type of brain damage that was seen in dementia,which is not a necessary consequence of ageing.
Meanwhile,two similar studies by a separate team have thrown more light on how young blood may benefit the old,in mice at least.A substance in the blood of mice previously shown to have an anti-ageing effect on heart muscle also improved brain cells,according to a Harvard team.The research,published in Science,found the blood factors encouraged the growth of brain cells in old mice,and restored their sense of smell.The same chemical also improved muscle power of aged mice,the researchers found.
29.The underlined word in paragraph 1probably meansA.
A.change B.destroy C.speed D.increase
30.Scientists in the US will test the discovery in humans with the aim ofD.
A.proving the possibility to live longer.
B.showing the importance of scientific research.
C.publishing the study in Nature Medicine.
D.treating an age-related disease successfully.
31.According to the studies,the blood from young mice benefits the old in certain ways except inC.
A.memory B.muscle power C.fur color D.brain cells
32.What's the author's attitude to the anti-ageing studies?B
A.supportive B.objective C.negative D.doubtful.
分析 本文是科普类阅读,讲述的是通过在老鼠身上实验发现通过注射年轻老鼠的血液可以改善年老的老鼠的一些状况,将有助于老年痴呆治疗的研究.
解答 29-32 ADCB
29.A 考查细节理解题.根据第一段提到Researchers in the US say they might have discovered how to fight against and even reverse some processes of ageing,at least in mice.Injecting the blood of young mice into the older ones improved their brainpower,a study found.美国一项研究说,他们可能发生了如何对抗和颠倒年龄的过程,在年老的老鼠身上注射年轻老鼠的血液,提高他们大脑的活力,故选A项.
30.D 考查细节理解题.根据第一段提到Scientists at Stanford University plan to carry out trials in people in the hope that new treatments for dementia(痴呆症) can be developed斯坦福大学的科学家计划进行这些实验目的是发现治疗痴呆症的治疗方案,故选D项.
31.C 考查细节理解题.根据倒数第二段提到A research center in UK said the treatment restored certain aspects of learning and memory in mice有助于学习记忆的方面再根据最后一段提到The research,published in Science,found the blood factors encouraged the growth of brain cells in old mice,促进年老的老鼠的脑细胞的生长,故没有提到C 项.
32.B 考查推理判断题.根据倒数第二段提到The research,while very interesting,did not test the type of brain damage that was seen in dementia,which is not a necessary consequence of ageing这个研究虽然很有趣,但没有检出大脑在痴呆坏掉的细胞,这不是变老的必然结果,可见作者持有客观的态度,故选B项.
点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
A. | giving | B. | to be given | ||
C. | being given | D. | that I have been given |
We can only show mercy to the (4)A man who had to stop his car soon after setting out from a country village to drive to London.Hearing a strange noise from the(5)B of the car,he naturally got out to examine the wheels carefully,but he found nothing wrong,so he (6)B his way.Again the noise began,(7)D and became even louder.Quickly turning his head,the man saw what appeared to be a great (8)A cloud following the car.When he stopped at a village further on,he was told that a queen bee must be hidden in his car as there were thousands of bees (9)C.
On learning this,the man drove away as quickly as possible.After an hour's (10)D driving,he arrived safely in London,where he parked his car outside a (11)A and went in.It was not long before a customer who had seen him arrive(12)C in to inform him that his car was (13)B with bees.The poor driver was (14)A that the best way should be to call a (15)A.In a short time the man arrived.He found the unwelcome passenger hidden near the wheels at the back of the car.Very thankful to the driver for this unexpected gift,the bee-keeper took the queen and her thousands of followers home in a large box.
1. A.connection | B.difference | C.communication | D.similarity |
2. A.passengers | B.insects | C.former | D.first |
3. A.give | B.keep | C.pay | D.draw |
4. A.unfortunate | B.careless | C.unpleasant | D.hopeless |
5. A.front | B.back | C.left | D.right |
6. A.drove | B.continued | C.pushed | D.forced |
7. A.normally | B.gently | C.quietly | D.immediately |
8. A.black | B.beautiful | C.white | D.colorful |
9. A.below | B.ahead | C.nearby | D.behind |
10.A.boring | B.careful | C.exciting | D.hard |
11.A.hotel | B.museum | C.hospital | D.school |
12.A.broke | B.moved | C.hurried | D.dropped |
13.A.crowded | B.covered | C.filled | D.equipped |
14.A.advised | B.required | C.ordered | D.requested |
15.A.bee-keeper | B.policeman | C.waiter | D.repairman |
A. | as | B. | on | C. | for | D. | to |