问题 完形填空

My Experience in a Free School

At first I couldn't believe it! There were no __26  in rows; no bells rang; no one had to go to __27  . Although we all lived “in”, __28  made us go to bed at a certain time; there was no “lights out”.

The __29 thing was that practically all the students went to class, __30  very few people stayed up late at night. Only the new people stayed up or _31 class. The new ones always went wild __32, but this never lasted long. The __33 took some getting used to. Our teachers treated us like_34; never did we have to __35 “stand up”,“sit down”,“speak out”. I don't __36 one student who didn't try his best.

The subjects were the same as those in __37school, but what a difference in the approach(方式)! For example, in botany(植物学) we had __38  classes in the spring or fall, but instead we __39 [ZZ(Z)39two gardens, a vegetable garden and a flower garden. __40 in winter we each studied a few __41  things about what we had grown. In math the students built three different kinds of storerooms small ones __42 ,but usable. They did this instead of having lessons in the classroom. They really had a __43 time too, designing everything, drawing the blueprints, __44  the angles(角度) and so on. I didn't take __45 .I can't stand it! Besides, I could do the basic things with numbers. That's __46!

__47 I think I am a __48  person for having gone to the school. I can read and write as well as anyone else my age, and I can think  better. That's probably a real big __49   between the free school and regular school—the amount of __50.

26.A. desks          B. lights        C. students         D. buildings

27.A. home           B. bed           C. class            D. work 

28.A. anybody        B. nobody        C. teachers         D. parents

29.A. sad            B. last          C. good             D. strange 

30.A. and            B. but           C. so               D. yet 

31.A. attended       B. took          C. missed           D. studied 

32.A. from then on   B. at first      C. once more        D. just then 

33.A. freedom        B. habit         C. time             D. people 

34.A. workers       B. pupils         C. gardeners        D. grownups 

35.A. understand    B. study          C. play            D. say 

36.A. hear from     B. feel like      C. think about      D. know of 

37.A. night         B. regular        C. small            D. real 

38.A. all           B. short          C. no               D. indoor 

39.A. planted       B. studied        C. drew             D. toured 

40.A. Still         B. Then           C. Yet              D. Next 

41.A. wild          B. successful     C. usual            D. particular

42.A. as well       B. after a while  C. of course        D. as a result 

43.A. funny         B. great          C. convenient       D. thoughtful

44.A. looking out   B. taking out     C. finding out      D. figuring out 

45.A. math          B. care           C. botany           D. notice 

46.A. dull          B. interesting    C. enough           D. dangerous

47.A. On the whole  B. Once again     C. Sooner or later  D. After a while 

48.A. careful       B. better         C. busier           D. lovely 

49.A. problem       B. chance         C. difference       D. change

50.A. reading       B. gardening      C. teaching         D. thinking

答案

26--50   ACBDA   CBADC   DBCAB   DCBDA   CABCD  

26.在教室里没有排成一排排的课桌。答案为A。 

27. 没有人必须去上课。答案为C。 

28.没有人强迫我们在一定的时间上床睡觉。答案为B。 

29.更奇怪的是所有的学生都去上课。答案为D。 

30.这里表示并列,所以要填and。答案为A。 

31.只有新来的学生缺课。“缺课”英语是“missed class”。答案为C。

32.新学生在开始的时候表现粗野。答案为B。 

33.free school的特点是拥有较多的freedom,所以这个句子表达的是:新学生逐渐习惯于这种自由的生活。答案为A。 

34. 教师像对待成年人一样对待学生。答案为D。

35.我们从来不必表演“起立”“坐下”等这些动作。答案为C。 

36.know of是听说的意思。答案为D。 

37.作者在这篇短文中讲述的是自由的学校,而其它学校则是正规的学校。A项night school“夜校”;C项small school“小学校”;D项real school“真正的学校”;free school也是真正的学校,并且也有可能是小学校。根据文意,答案为B。 

38.在春季和秋季没有植物课。答案为C。 

39.planted two gardens的意思是我们有两个花园。答案为A。 

40.从上文中的the spring or fall和下文中的winter可知,动作是按顺序时间发生的,所以应填then。答案为B。 

41.研究几种自己种植的特殊的植物。答案为D。 

42.storeroom虽然小,但是可以使用。答案为C。 

43.great在此为“(时间)久的”意思。这句话意思为:学生们要花费很多的时间进行设计,画出图纸,计算角度等。答案为B。 

44. figuring out的意思是“计算出”。答案为D。 

45. 从上文可知,作者没有学习数学。答案为A。 

46.作者认为,能用数字做一些基础工作就完全足够了。答案为C。 

47.On the whole的意思是“大体上”“基本上”。答案为A。 

48.作者认为自己是较好的学生。答案为B。 

49.自由学校和正规学校之间的不同点。答案为C。 

50.从上文可知,作者认为自己比同龄人更会思考。所以他认为自由学校和正规学校的最大区别是思考的分量。A项reading“阅读”;B项gardening“园艺”;C项teaching“教学”。答案为D。 

问答题

Passage Four

Despite their names, satin and soman are exceptionally ugly sisters. They are organophosphorous nerve gases. They are cheap and simple to manufacture. And mere milligrams—just a drop—of either is enough to kill an adult in a couple of minutes. They therefore make particularly fine weapons of mass destruction, equally popular with rogue dictators who have not been able to build nuclear bombs and with weird cults such as Aum Shinrikyo, which gassed the Tokyo subway in 1995.

Detecting them soon enough to prevent their effects can be difficult. Even detecting them after the event—if you are, for example, a United Nations weapon inspector—can be haphazard. But help may be at hand. A paper in this month’s edition of Analytical Chemistry, by George Murray and his team at John Hopkins University’s Applied Physics Laboratory in Laurel, Maryland, reports a new way of picking up minute qualities of the two gases without the risk of false alarms from legitimate organophosphorous compounds such as insecticides.

Dr Murray’s detector consists of a fiber-optic cable that has one end plugged into a laser and the other coated with a metal called europium. The laser generates blue light, and europium has the property of shining red when exposed to blue light of the correct wavelength—an effect that is exploited in many optical devices. But the metal possesses a second property that makes it uniquely suitable for Dr. Murray’s purpose: it reacts ply with organophosphates, and when it does so, the wavelength of the light that is emitting changes perceptibly.

To stop his detector going off in response to the wrong signals such as insecticide on the flea collar of a dog, Dr Murray has resorted to a second trick. The europium is embedded in a plastic film that binds specifically to sarin or soman (they are very similar molecules), using special pockets called molecular imprints that have been chemically etched into it. The organophosphates commonly used as pesticides do not fit into these pockets; and so fail to react with the metal. The result is a detector that is both sensitive ( it can pick up concentrations of as seven nerve-gas molecules in a trillion) and reasonable fast (it is able to sound the alarm within 30 seconds).

So far, Dr Murray has tested his device only on soman dissolved in water. This is mainly a safety measure, because water-borne nerve agents are easier to handle than those in gaseous form. But soman or sarin-contaminated water supplies are a real hazard in themselves—and not just in far-flung war zones. In America, for example, there are occasional leaks from military bases. The most recent was from Tooele Chemical Disposal Facility in Utah, one of the sites where the country’s chemical weapons stockpile is being destroyed. At the moment it would be hard to work out if any material from such a spill had found its way into the water supply until people started to become ill.

Dr Murray seems confident, however, that his technology will work just as well on sarin and saman gas, and has prepared "smart" cards coated with the mixture of europium and plastic to detect airborne nerve gases. Unfortunately, he does not, at the moment, have access to any place where the safety regulations will permit him to try them out. But if UN inspectors were ever allowed back into Iraq, he might have a chance.

Which part of the detector is the decisive factor that enables it avoid to false alarm ?()

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