Many do-it-yourself homeowners are interested in 
trying out solar power to leam about the technology and
perhaps to provide energy for limited-use applications．
There are a variety of ways to find cheap solar panels
（板）, including buying used and building your own
with factory seconds．Both methods will save money
while forcing you to learn the ins-and-outs of a solar
power array （阵列）．
We've all seen solar-powered street signs or PV
panels being used for various purposes at remote locations．
When those units become cracked or chipped and are considered "unsafe", companies are forced to replace them, generally to avoid responsibility issues．Because it's difficult to get rid of PV panels, many companies, if approached, are willing to give them away or to sell them for modest prices．Depending on the degree of damage present, expect to see performance degradation （降级） in the range of 10% to 60%．A multimeter （万用表） can be used to test the panel before buying．If the panel's free, take it anyway．It could still be useful in a home solar project．
A solar panel is really nothing but a box serving as a container for a large group of solar cells．Factory second solar cells are usually sold on eBay at a small part of their regular cost．The cells come in a variety of sizes．You will need to figure out how much power a single cell produces to determine how many will need to be wired together to form an array．
A simple search of the Internet will show numerous sites detailing home solar panel projects．Do-it-yourself lovers are generally quite generous in supply photographs of their work and description of what went wrong and right with the project．
Getting cheap solar panels with slight imperfections, either used or through sales of factory seconds, is a perfect solution for home-built renewable energy projects．The high number of solar lovers online provide a wealth of useful information．Only limited skills are required, plus an understanding of the basic wiring involved．All are well within the talents of almost any home handyman．Beyond the satisfaction of having completed the project, you'll come away with a functional solar panel that will be a source of power for use around the house or at remote locations．
Solar energy systems are quickly becoming more popular with homeowners as prices continue to decline．
72．The author writes the passage to introduce ____．
A．ways of finding cheap solar panels B．ways of saving energy
C．a way of making a solar panel D．a home-built energy system
73．What does the phrase "factory seconds" in the passage refer to?
A．Second-hand factory products． B．Cheap but perfect factory products
C．Faulty factory solar cells． D．The second best factory solar cells
74．From Paragraph 5, we can learn about home-built energy projects that ____．
A．none of them are beyond home handymen
B．a lot of useful information is available on the Internet
C．a perfect solution is to get cheap and perfect solar panels
D．understanding electrical wiring is not necessarily needed
75．What is the author's attitude towards the future of solar energy systems?
A．Optimistic． B．Pessimistic. C．Indifferent． D．Doubtful
One of our biggest fears nowadays is that our kids might some day get lost in a “sea of technology” rather than experiencing the natural world. Fear-producing TV and computer games are leading to serious disconnect between kids and the great outdoors, which will change the wild places of the world, its creatures and human health for the worse, unless adults get working on child’s play.
Each of us has a place in nature we go sometimes, even if it was torn down. We cannot be the last generation to have that place. At this rate, kids who miss the sense of wonder outdoors will not grow up to be protectors of natural landscapes. “If the decline in park use continues across North America, who will defend parks against encroachment（蚕食）?”asks Richard Louv, author of Last Child in the woods.
Without having a nature experience, kids can turn out just fine, but they are missing out a huge enrichment to their lives. Experts predict modern kids will have poorer health than their parents—and they say a lack of outside play is surely part of it; research suggests that kids do better academically in schools with a nature component and that play in nature fosters（培养）leadership by the smartest, not by the toughest, Even a tiny outdoor experience can create wonder in a child. The three-year-old turning over his first rock realizes he is not alone in the world. A clump of trees on the roadside can be the whole universe in his eyes. We really need to value that more. Kids are not to blame. They are over-protected and frightened. It is dangerous out there from time to time but repetitive stress from computers is replacing breaking an arm as a childhood rite（仪式）of passage.
Everyone, from developers, to schools and outdoorsy citizens, should help regain for our kids some of the freedom and joy of exploring, taking friendship in fields and woods that strengthen love, respect and need for the landscapes. As parents, we should devote some of our energy to taking our kids into nature. This could yet be our greatest cause.According to the passage, children without experiencing nature will______
| A．keep a high sense of wonder |
| B．be over-protected by their parents |
| C．be less healthy both physically and mentally |
| D．change wild places and creatures for the better |
According to the author, children’s breaking an arm is_____
| A．the fault on the part of their parents |
| B．the natural experience in their growing up |
| C．the result of their own carelessness in play |
| D．the effect of their repetitive stress from computers |
In writing this passage, the author mainly intends to______
| A．blame children for getting lost in computer games |
| B．encourage children to protect parks from encroachment |
| C．show his concern about children’s lack of experience in nature |
| D．inspire children to keep the sense of wonder about things around |
The principles about applying for jobs have altered greatly lately. In the past, people preferred a hand-written application letter．However, nowadays it is becoming more and more common to apply for a job through the Internet．You can find information on the Internet about how to apply for jobs．Information can be found about how to fulfill your application letter, the clothes that you should wear and how to carry out the interview itself．
The importance of body language is often mentioned，but doesn’t always get the attention it deserves．After all，before a word has even been spoken，your body language will have already given people their first impression of you．Additionally, your body language will also give out a lot more information．Based on your body language it can be seen if you are self-confident．It can also show if you are a busy or a quiet type and it helps give an impression of whether you are speaking truthfully or not．Body language can show how enthusiastic you are and if you are a nice person．someone who will take his work seriously, but also someone who has a sense of humor and can enjoy a joke from time to time．The members of the application committee will ask you questions，but your answers won’t only be oral．The committee will not only pay attention to what you say, but also to how you say it! Body language will determine first if it ‘clicks’，and sometimes all it takes is just a few seconds．Everybody uses body language，but it takes place mostly at a subconscious（下意识的） level．Using body language appropriately, you can definitely increase your chances of getting a job．What kind of people is the text mainly meant for?
| A．Interviewers | B．Job-hunting people |
| C．Employers | D．Lay-off workers |
We can learn from the first paragraph that_______．
| A．hand-written letters are not used in finding a job |
| B．the more expensive clothes interviewees wear, the better |
| C．body language is more important than spoken words |
| D．Internet is of significance in applying for a job |
Using body language well in a job interview will probably _______.
| A．get rid of the interviewers’prejudice |
| B．determine what position one will get |
| C．increase the possibility to get the wanted job |
| D．help one remove nervousness |
Which of the following statements is TRUE according to the passage?
| A．Those using body language are usually confident. |
| B．Body language is often used on purpose in job hunting. |
| C．Body language is a mirror to reflect one’s personality. |
| D．People enjoying jokes are preferred in a job interview. |
Welcome to your future life!
You get up in the morning and look into the mirror. Your face is firm and young-looking. In 2035, medical technology is better than ever. Many people your age could live to be 150, so at 40, you’re not old at all. And your parents just had an anti-aging(抗衰老的) treatment. Now, all three of you look the same age!
You say to your shirt, “Turn red.” It changes from blue to red. In 2035, “smart clothes” contain particles(粒子) much smaller than the cells in your body. The particles can be programmed to change clothes’ color or pattern.
You walk into the kitchen. You pick up the milk, but a voice says, “You shouldn't drink that!” Your fridge has read the chip (芯片) that contains information about the milk , and it knows the milk is old . In 2035, every article of food in the grocery store has such a chip.
It’s time to go to work. In 2035, cars drive themselves. Just tell your “smart car” where to go. On the way, you can call a friend using your jacket sleeve. Such “smart technology” is all around you.
So will all these things come true? “For new technology to succeed,” says scientist Andrew Zolli, “it has to be so much better that it replaces what we have already.” The Internet is one example --- what will be the next? We can learn from the text that in the future__________.
| A．people will never get old |
| B．everyone will look the same |
| C．red will be the most popular color |
| D．clothes will be able to change their pattern |
What can be inferred from Paragraph 4?
| A．Milk will be harmful to health. |
| B．More drinks will be available for sale. |
| C．Milk in the grocery store will stay fresh much longer. |
| D．Food in the grocery store will carry electronic information. |
Which of the following is mentioned in the text?
| A．Fridges will know what people need. |
| B．Jacket sleeves can be used as a guide. |
| C．Cars will be able to drive automatically. |
| D．Nothing can replace the Internet. |
What is the text mainly about?
| A．Future technology in everyday life. |
| B．Food and clothing in 2035. |
| C．Medical treatments of the future. |
| D．The reason for the success of new technology. |
Getting rid of dirt, in the opinion of most people, is a good thing. However, there is nothing fixed about attitudes to dirt.
In the early 16th century, people thought that dirt on the skin was a means to block out disease, as medical opinion had it that washing off dirt with hot water could open up the skin and let ills in. A particular danger was thought to lie in public baths. By 1538, the French king had closed the bath houses in his kingdom. So did the king of England in 1546. Thus began a long time when the rich and the poor in Europe lived with dirt in a friendly way. Henry IV, King of France, was famously dirty. Upon learning that a nobleman had taken a bath, the king ordered that, to avoid the attack of disease, the nobleman should not go out.
Though the belief in the merit of dirt was long-lived, dirt has no longer been regarded as a nice neighbor ever since the 18th century. Scientifically speaking, cleaning away dirt is good to health. Clean water supply and hand washing are practical means of preventing disease. Yet, it seems that standards of cleanliness have moved beyond science since World War Ⅱ. Advertisements repeatedly sell the idea: clothes need to be whiter than white, cloths ever softer, surfaces to shine. Has the hate for dirt, however, gone too far?
Attitudes to dirt still differ hugely nowadays. Many first-time parents nervously try to warn their children off touching dirt, which might be responsible for the spread of disease.On the contrary, Mary Ruebush, an American immunologist(免疫学家)，encourages children to play in the dirt to build up a strong immune system. And the latter position is gaining some ground. The kings of France and England in the 16th century closed bath houses because .
| A．they lived healthily in a dirty environment. |
| B．they believed disease could be spread in public baths |
| C．they thought bath houses were too dirty to stay in |
| D．they considered bathing as the cause of skin disease |
Which of the following best describes Henry IV’s attitude to bathing?
| A．Approving. | B．Afraid. |
| C．Curious | D．Uninterested. |
How does the passage mainly develop?
| A．By providing examples. |
| B．By making comparisons. |
| C．By following the order of time. |
| D．By following the order of importance. |
What is the author’s purpose in writing the passage?
| A．To stress the role of dirt. |
| B．To introduce the history of dirt. |
| C．To call attention to the danger of dirt. |
| D．To present the change of views on dirt. |
BEIJING - A research team led by Chinese scientists have discovered dietary modulation of gut microbiota（膳食干预肠道菌群）can alleviate both genetic and simple obesity in children.
The findings of the team, led by Zhao Liping with Shanghai Jiaotong University, Yin Aihua with the Guangdong province children's hospital, and Tang Huiru with Chinese Academy of Sciences, have been published on EBioMedicine, a renowned medical journal co-sponsored by Cell and The Lancet in July.
The team identified bacterial genomes specifically for producing obesity-related metabolites（代谢物）, and said an improved gut microbiota can significantly help to treat genetic obesity such as Prader-Willi Syndrome (PWS).
Beginning in childhood, PWS affected kids develop an insatiable appetite, leading to chronic overeating and obesity.
The scientists used a diet therapy with beneficial gut bacteria on trial patients and found considerable diminished appetite, weight loss and improved health conditions on the patients.
The paper concluded dysbiosis （失调）of gut microbiota is highly related with both genetic and simple obesity in children, implicating dietary modulation of gut microbiota a potentially effective treatment method. Which of the following factors contributes to child obesity?
| A．dietary modulation of gut microbiota |
| B．beneficial gut bacteria |
| C．an improved gut microbiota |
| D．dysbiosis of gut microbiota |
Which can replace the underlined word “diminished”？
| A．unsatisfied | B．increased |
| C．decreased | D．good |
Where is the passage extracted?
| A．Medicine book | B．Science book |
| C．Doctor’s instructions | D．News report |
Which might be the best title for the passage?
| A．Chinese scientists discover treatment to child obesity. |
| B．The reasons for genetic obesity in children has been found. |
| C．Obesity-related research has been done by Chinese scientists. |
| D．An effective treatment to obesity has been found. |