2.Huichol people：维克人。他们是居住在墨西哥中西部地区马德雷山脉的土著印地安人。该地区山路崎岖，所以西班牙人未涉足于此，墨西哥文化也没能影响维克人的土著文化。据估计，维克印地安人现仅存约一万人。 3.string power lines：架设输电线
4.Now，a team of scientists?is using：a team of scientists可以视作单数，也可以视作复数。本句用作单数，所以后接的谓语动词是is。 5.At the core of：此处the core of意为the basic or most important part of(最重要的部分)。
6.At the core of Portable Light technology are devices called high-brightness light-emitting diodes， or HB LEDs：本句是倒装句，主语是“devices called high-brightness light-emitting diodes, or HB LEDs\，谓语动词是“are”。High-brightness light-emitting diodes可译为“高亮度发光二极管。 练习：
1.To make a living，the Huichol create artwork and A.sell it to tourists in their villages.
B.sell it in cities far away from their villages. C.display it in their village museum.
D.keep it in their homes to attract tourists. 2.Why Can Portable Lights emit light?
A.Electronic crystals are woven into fabrics.
B.Items such as clothes and bags are used to carry lights. C.The sun’s energy is collected during the day. D.All of the above.
3.What does Sheila Kennedy say about Portable Lights?
A.This invention Can change the lives of people，both rich and poor. B.They are widely used in the United States.
C.Portable Lights can help poor people around the world to get light. D.They are expensive to make but easy to carry.
4.What is the most important part of the Portable Light technology? A.HB LEDs B.Glass Bulbs.
C.Incandescent lights. D.Heated metal coils.
5.LEDs are different from light bulbs in that
A.LEDs ale incandescent lights while light bulbs are not. B.LEDs have a metal coil while light bulbs have not. C.LEDs emit colored light while most fight bulbs don’t.
D.LEDs are made up of tiny pieces of rock while light bulbs are not. 答案与题解：
1.B短文的第一段提供了答案，该段告诉我们，维克人为了谋生，制作工艺品，并到几百英里以外的城市去销售。
2.D文章的第二和第三段包括了A、B和C所述内容。所以D是答案。 3.C短文的第四和第五段提供了答案。短文第四段的句子说了Potable Lights可以在世界范围内改变穷乡僻壤用不上电的人们的生活，C准确地表达了这层意思，所以是答案。A不是答案，说Potable Lights能改变富人穷人的生活，不符合原文的意思。短文没有提及Portable Lights在美国使用，也没有说Portable Lights是否花费很大。所以B和D都不是答案。
4.A 第六段的第一句提供了答案。Portable Lights技术的最主要部分是high-brightness light-emitting diodes，即高亮度发光二极管。
5.C短文的第六段对light bulbs进行了描述。第二句中的those glass bulbs即指第一句中的light bulbs。因此，LEDs不是incandescent lights(白炽灯)，也没有金属丝。所以A和B均是错误的选择。最后一段的第一个句子LEDs，on the other hand，are like tiny pieces of rock
made up of molecules that are arranged in a crystal structure中的like pieces of rock，不等于pieces of rock，所以，D也是错误选择。根据短文的最后一段内容，C是正确选择。 第三十四篇
Batteries Built by Viruses
What do chicken pox, the common cold，the flu，and AIDS have in common? They're all disease caused by viruses，tiny microorganisms that can pass from person to person. It’s no wonder1 that when most people think about viruses, finding ways to steer clear of2 viruses is what's on people's minds.
Not everyone runs from the tiny disease carriers, though3.In
Cambridge，Massachusetts4, scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work，teaching them to build some of the world’s smallest rechargeable batteries. Viruses and batteries may seem like an unusual pair, but they're not so strange for engineer Angela Belcher, who first came up with5 the idea. At the Massachusetts Institute of Technology (MIT) in Cambridge，she and her collaborators bring together different areas of science in new ways. In the case of the virus-built batteries，the scientists combine what they know about biology，technology and production techniques.
Belcher’s team includes Paula Hammond，who helps put together the tiny batteries，and Yet-Ming Chiang, an expert on how to store energy in the form of a battery. \re working on things we traditionally don’t associate with nature,\
Many batteries are already pretty small. You can hold A，C and D batteries6 in your hand. The coin-like batteries that power watches are often smaller than a penny. However，every year，new electronic devices like personal music players or cell phones get smaller than the year before. As these devices shrink，ordinary bakeries won’t be small enough to fit inside.
The ideal battery will store a lot of energy in a small package. Right now，Belcher’s model battery，a metallic disk completely built by viruses，looks like a regular watch battery. But inside，its components are very small-so tiny you can only see them with a powerful microscope. How small are these battery parts? To get some idea of the size，pluck one hair from your head. Place your hair on a piece of white paper
and try to see how wide your hair is-pretty thin，right? Although the width of each person’s hair is a bit different，you could probably fit about 10 of these virus-built battery parts，side to side，across one hair. These microbatteries may change the way we look at viruses7. 词汇：
chicken pox水痘 collaborator n.合作者，协作者 microorganism n.微生物 pluck v.拔，摘，采 metallic adj.金属的 注释：
1.no wonder：不足为奇的，难怪 2.steer clear of：避开，绕开
3.though：意思为“然而，可是”。在句中使用时通常放在句末。 4.Cambridge，Massachusetts：马萨诸塞州的剑桥市。本文第三段提到的the Massachusetts Institute of Technology(MIT)in Cambridge即指坐落于剑桥市的麻省理工学院。麻省理工学院于1861年由著名自然科学家威廉·巴罗吉杰斯创立。这是美国的一所私立研究型大学，培养高级科技人才和管理人才，是以理工科为主的、世界一流的综合性大学。 5.came up with：提出
6.A，C and D batteries：A、C、D均为电池型号。
7.These microbatteries may change the way we look at viruses：这些微型电池可能会改变我们看待病毒的方式。作者想表达的意思是：人们一直认为病毒有害无益，现在病毒可用来制作电池，人们对病毒的看法可能会因此而发生变化。 练习：
1.According to the first paragraph，people try to
A.kill microorganisms related to chicken pox，the flu，etc. B.keep themselves away from viruses because they are invisible. C.stay away from viruses because they are causes of various diseases.
D.cure themselves of virus-related diseases by taking medicines. 2.What is Belcher’s team doing at present? A.It is finding ways to get rid of viruses.. B.It is mass-producing microbatteries. C.It is making batteries with viruses. D.It is analyzing virus genes.
3.What expression below is opposite in meaning to the word \appearing in paragraph 5 ? A.Broaden. B.Spread. C.Extend. D.Expand.
4.Which of the following is true of Belcher’s battery mentioned in paragraph 6?
A.It is made of metal.
B.It is a kind of watch battery.
C.It can only be seen with a microscope. D.It is a metallic disk with viruses inside it. 5.How tiny is one battery part? A.Its width is one tonth of a hair. B.It equals the width of a hair. C.It is as thin as a piece of paper. D.Its width is too tiny to measure. 答案与题解：