A 当存在两种以上的选择时，我们人类会思路活跃作出最佳选择。有时会有十种，甚至二十种不同的方法去做某事，其中肯定有一种方法是对的。然而正是这种大量的可选择性才能把我们带入一个完全崭新的领域。这个过程可称为探索而且基于人类的易犯错误性上。如果我们人类的大脑只有一个中心，只能在当正确的决定作出后才有反应，而不是象一团乱麻似的把不同的、糊涂的或清醒的神经原组合在一起。正是这些神经网络会使我们的思路好象一会儿进入绝路，一会儿跳到树上，一会儿又掉进死胡同，然后又从死胡同跳出后进入一片蓝天，沿着错的转弯处，在错误处徘徊，那么我们就会像呆在现在所处的原地，静止不前。 目前，一种被英国警察广泛使用的电脑破案方法称为“模拟影像”。由目击者描述疑犯，然后像拼图版似的用五种不同部位的特征把照片拼出。这五个部位是：发型，眼睛，鼻子，嘴巴和下巴。这种方法对寻找罪犯很有帮助，但二十件案子仅能破一件。事实上，通常几近半数的“模拟影像”是误导。造成这种情形有两个原因。第一种原因是这种模拟影像的照片与疑犯毫无相象之处。第二是相象之处太大众化而没有任何帮助。不幸的是，这种误导的想象会导致一个无辜的人被关押。 B
1. Knowing many places in China were badly flooded, actors and actresses volunteered to perform， appealing for charitable contributions from the society.
2. If you manage to get in touch with Mr. Smith, the problem will be solved easily because he is an expert in this field.
3. The advisor forgave him for mixing the two chemicals together; after all he had intended to help his advisor.
4. I want to throw away the computer I am using now for it gets stuck all the time.
5. Teachers are worried about students who seem to do everything by the book.
6. He was in a bad mood for some time and therefore he felt everything around him was screwed up.
7. We all believe that eh will succeed sooner or later though he failed more than ten times.
8. Teenagers over 16 years of age should be responsible for what they say and do, because they are considered to have the faculty for doing and saying the right thing.
9. He thought everything was within his grasp but, in fact, the result of the experiment turned out to be controversial.
10. Any average good fax machine can send a message in an instant across the ocean. Reading Practice
1.F 2.T 3.F 4.T 5.F Unit 12
Vocabulary and Structure
A 1. casual 2. congeniality 3. niche 4. intellect 5. commitment
6. temperament 7. individuality 8. courteous 9. accentuate 10. invoke
B 1. appreciation 2. constituted 3. sparkles 4. compartmentalized
5. niche 6. heightened 7. binding 8. articulately 9. mutual 10. irreconcilable
C 1.B 2.A 3.D 4.B 5.A 6.C 7.C 8.B 9.D 10.B
D 1. centered on 2. went back to 3. drew on 4. Taking into account 5. fall into step 6. took up
7. struck up 8. is based on 9. came into being 10. served on 11. left off 12. out of step
E 1. C. how little it might be 2. A. was 3. D. however 4. C. that 5. B. are these techniques
6. C. it 7. B. expected 8. D. until 9. B. that 10. A. Aside from
F. 1. whom 2. crossing 3. neighbor 4. mother 5. maybe 6. indeed 7. for 8. when
9. lift 10. as 11. come 12. public 13. which 14. being 15. depressed 16. blind 17. never 18. over 19. sufficient 20. mutual
Translation and Writing
A 与法国截然不同的是，在德国，友谊更清楚地表达为一种感情的根由。处于青春期的少男少女们，建立起深厚的友谊。他们在一起散步、交谈――与其说是为了增长智慧，还不如说是为了倾吐各自的希望，忧虑和憧憬，为了团结一致组成统一战线来对付校方和家庭的干涉，并通过交往可以彼此了解对方和自己的内心世界。
我曾经说过， 朋友自始至终是朋友。但是现在我相信这个观点是狭隘的。因为我所拥有的友谊和我见过的友谊是有不同层次的。起着不同作用，满足不同需要。有知心姐妹那样的自始至终的朋友的友谊，也有最无关紧要的偶尔在一起玩玩的友人之间的友谊。 B
1.If you have agreed to pay your brother’s school expenses, and give your sister ￡100 a year for clothes, you have made quite a lot of commitments.
2. Her affected manners were in striking contrast with Harriet’s spontaneous gaiety.
3. His remarks drew heavily upon his experiences in that country. 4. His acting in the play was remarkable, taking into account his youth and inexperience.
5. He exerted himself to take up where his father had left off.
6. The President took his place on the platform, and the military band struck up the national anthem.
7. The friendly contacts between the two countries go back to the Tang Dynasty.
8. That kind of people stay put in one job all their lives. 9. The new responsibilities drew out his latent talents.
10. The President’s public statements are obviously out of step with the majority of his party.
Reading Practice
1. B 2.A. Friendships are conducted at many levels of intensity. B. Friendships meet different needs. C. Friendships meet different needs.
D. Friendships range from those as all-way. As the friendship of soul sisters to that of the most nonchalant and casual playmates.
3. A. office friends B. yoga friends C. tennis friends D. club friends E. shopping friends, etc.
4. Crossroads friends are people who shared friendship at a crucial, now past, time of life. The author thinks that crossroads friends forge powerful links strong enough to endure with not much more contact than once-ayear letters at Christmas. 5. D. 6. A 7. D
8. Because it is believed that man-woman friendship can be just as close and as dear as the friendship among women.
9. We care very much about what to say and what not to say at each different level of intimacy.
10. A. Love, support and trust each other.
B. Bare to each other the secrets of their souls and run to help each other.
C. Tell harsh truths to each other when the6y must be told.
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