2019年全國(guó)英語(yǔ)等級(jí)考試二級(jí)閱讀習(xí)題（10）

　　Scientists at Royal Holloway, University of London and Queen Mary, University of London have discovered that bees learn to fly the shortest possible route between flowers even if they discover the flowers in a different order. Bees are effectively solving the “traveling salesman problem”, and they are the first creatures found to do this.

　　The traveling salesman must find the shortest route that allows him to visit all locations on his route. Computers solve it by comparing the length of all possible routes and choosing the shortest, and it can keep computers busy for days. However, bees solve it without computer assistance using a brain the size of grass seed. Dr. Nigel Raine, from the School of Biological Sciences at Royal Holloway explains, “Bees solve traveling salesman problems every day. They visit flowers at multiple locations and because bees use lots of energy to fly, they find a route which keeps flying to a minimum. ”

　　The team used the computer to control artificial flowers to test whether bees would follow a route defined by the order in which they discovered the flowers or if they would find the shortest route. After exploring the location of the flowers, bees quickly learned to fly the shortest route.

　　As well as improving our understanding of how bees move around the landscape pollinating(授粉)crops and wild flowers, this research, which is due to be published in The American Naturalist, has other applications. Our lifestyle relies on networks such as traffic on the roads, information flow on the Web and business supply chains. By understanding how bees can solve their problems with such a tiny brain, we can improve our management of these everyday networks without needing lots of computer time. Dr. Raine adds, “Despite their tiny brains, bees are capable of extraordinary feats of behavior. We need to understand how they can solve the traveling salesman problem without a computer. ”

　　小題1: What would be the best title of the passage?

　　A.Bees help salesmen travel

　　B.Tiny-brained bees solve a complex mathematical problem

　　C.How bees discover the flowers

　　D.How to solve the “traveling salesman problem”

　　小題2:We may infer from the second paragraph that the “traveling salesman problem” 　　　.

　　A.can be solved by a computer easily

　　B.can’t even be solved by a computer

　　C.can puzzle both people and computers

　　D.remains to be solved by scientists

　　小題3: The main purpose of the last paragraph is to　　　.

　　A.provide further proof for the research

　　B.tell us how bees can fly the shortest route between flowers

　　C.tell us how the research about bees’ flying route was conducted

　　D.explain the importance of the research

　　小題4: It can be concluded from the passage that　　　.

　　A.all creatures are smarter than computers

　　B.the research about bees’ flying route can be applied to many fields

　　C.our networks are more complex than bees’ ones

　　D.with the help of the computer we can find out how bees can solve the “traveling salesman problem”

　　參考答案及解析

　　小題1:B

　　小題2:C

　　小題3:D

　　小題4:B

　　小題1:選B。主旨大意題�！颁N售員旅行難題”用計(jì)算機(jī)也得需要幾天才能解決, 而蜜蜂毫不費(fèi)力地就能在花叢中找到最近的飛行路線, 故B項(xiàng)“具有微小大腦的蜜蜂解決了一個(gè)復(fù)雜的數(shù)學(xué)難題”作為文章的標(biāo)題最貼切。

　　小題2:選C。細(xì)節(jié)理解題。根據(jù)第二段可知, 銷售員在出發(fā)之前必須找到合適的路線, 這個(gè)“銷售員旅行難題”即使電腦也需要好幾天才能解決。

　　小題3:選D。推理判斷題。最后一段說(shuō)明了對(duì)蜜蜂飛行路線研究的意義和目的, 是為了幫助我們?cè)趯?shí)際生活中更好地節(jié)省時(shí)間和精力。

　　小題4:選B。推理判斷題。根據(jù)最后一段可以推斷出對(duì)蜜蜂飛行路線的研究可以應(yīng)用到其他領(lǐng)域中。