Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.
“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”
Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro/nanoelectromechanreal systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.
“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”
His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.
“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”
Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.
【小题1】Which of the following is true of Jae Kwon?

C 
Although women lead healthier, longer lives, the cruel opinion that they become "old” sooner than men is widespread in the workplace, research shows. 
A survey of more than 2,600 managers and personnel professionals showed that age discrimination is not only common in the workplace, but is shot through with inconsistencies (矛盾).
Six in ten managers reported being a victim of age discrimination -- usually because they were turned down for a job for being too old or too young. Yet more than a fifth admitted that they used age as an important standard.
Although the survey found widespread agreement that older workers were better than younger colleagues when it came to reliability, commitment (承担义务), loyalty (忠诚) and customer service, these qualities were not necessarily considered to be worthy of advancement.
A large number of persons believed that workers between 30 and 39 had the best promotion chances, with only 2 per cent giving examples of 50-year-olds or above.
There was evidence that people were considered old at different ages in different jobs. A young man working in IT said he was considered too old by the age of 28.
In fact there was no evidence to suggest that older workers were less valuable to companies than younger workers, in fact the opposite was often true because older workers often brought experience.
The findings also suggested that the Government's ideas on age in the workforce may also be out of step with reality.
64.Which is the discrimination mentioned in this passage?
A. The healthier women are, the sooner they will lose their jobs.
B. Society knows women should be respected, but it doesn't offer them any jobs.
C. Female managers respect male workers, but male managers don't respect female workers.
D. victims of age discrimination consider age as an important standard.
65.Older workers are better than younger colleagues because they have many advantages except that they are _____.    
A. dependable     B. married       C. faithful     D. helpful
66.Why does the writer mention a young man working in IT?
A. Because the writer thinks it a pity that this young man is old.
B. Because it's an example of different age standards in different jobs.
C. Because IT industry is developing too fast.
D. Because the writer doesn't think the young man is old.
67. Which statement is true according to the writer's attitude?
A. The present age standard doesn't go with reality.
B. The present age standard is reasonable.
C. women should work longer than men.  
D. Young workers should learn from old workers.

Professor Green, known to the world as a scientist, is not only absent-minded but short-sighted as well. His mind is always busy 41 scientific problems and seldom notices what is going on 42  him.
One fine day recently, he went  43 a walk in the countryside, but as 44  he has a book in his hand. When he went out , he began to read his book . He hadn’t gone far 45 he run into a big cow and fell down. In the fall, he had lost his glasses, without which he couldn’t see anything. He thought he had hit his head  46 a fat lady. “I’m sorry, Madam.” He said politely 47 searching for his glasses. As soon as he had 48 , he realized his mistake.
Soon he was fixing his mind on his book 49  and paid no attention to anything else. He had scarcely been walking for five minutes when he fell over again, _50 both his book and his glasses. This time he got very angry, seizing his umbrella, he gave the “cow” a wild blow. Then, after finding his glasses, he realized with horror that he made a second mistake. A large fat woman was fleeing from him in a horror.

The first MP4 player was born years ago. Soon many music fans were wondering how fantastic it is! If you have been into technology enough, perhaps you may have a knowledge of the MP4. If not, you do need to know something before buying one, even if you are familiar with MP3. MP3 is the CD-like disc with greater capacity. How about MP4? This small digital product will really enrich the joy from listening to music. You can even feel the “touch” of music to your soul!
Now, some similar digital products advertised as “MP4 player” are simply MP3 players, which do not play video and MPEG format and also lack other particular functions. These products confuse some buyers, as they may think the “MP4” players simply mean they can do more than MP3.
What is MP4?
It is a multimedia container. It is not only used to store digital audio and digital video streams, especially those of MPEG, but can also be used to store other data such as subtitles and pictures. As a most modern container format, it allows streaming over the Internet.
With the help of a piece of MP4 video equipment, you can change various programs such as MPEG to MP4, ASX to MP4, AVI to MP4 and so on, which can be done very quickly and easily without any effect on the sound quality. By installing DVD-MP4 software, you can transfer particular music from a DVD to an MP4 video file. It really excites your listening music experience.
Then, there is MP4 advanced and you can set your own collection of all the programs—TV shows, games, and music. You can even see movies which are still running in cinema. What else digital product could you possibly ask for?
【小题1】. It is suggested here that you should ______ before buying an MP4 player.

D
The future of agriculture must achieve several goals at the same time.
First, it now appears that we will have to double world food production in the next 40 years due to population growth, increasing meat consumption and pressure from biofuels (生物燃料). We will also have to reduce the environmental impacts from our farming practices, which have caused widespread damage to soils, ecosystems, waters and even the atmosphere. In fact, agriculture’s impacts are as bad as climate change as an environmental concern. Besides, we will have to improve food security for the world’s poor. While the Green Revolution of the 1960s made it possible to feed hundreds of millions more people than in earlier eras, the number of the under-nourished in the world has started to rise again. Finally, we will have to increase the recovering ability of agriculture from shocks. Today, our high-efficiency, globalized world has many benefits, but it is vulnerable (易受伤的) to destruction, whether from droughts, diseases or sudden price rises. We must start building better food systems to better keep us away from future shocks.
Currently, there are two models of agriculture: local and organic agriculture vs. globalized and industrialized agriculture. Each has been strongly supported and severely criticized, but neither of these models, standing alone, can fully meet our needs.
Organic agriculture teaches us important lessons about soils, nutrition and pest management. Unfortunately, organic food provides less than 1% of the world’s calories, mostly to the wealthy. It is hard to imagine organic farming developing to feed 9 billion. Globalized and industrialized agriculture has benefits of high output and low labor demands. Without it, billions of people would have starved. However, it has come with enormous environmental and social costs, which cannot be sustained.
Rather than voting for just one solution, we need a third way to solve the crisis. Let’s take ideas from both sides, creating new, hybrid solutions that increase production, save resources and build a more sustainable agriculture.
There are many promising avenues to pursue. A new “third way” for agriculture is not only possible but also necessary. Our problems are huge, and they will require everyone at the table, working together toward solutions.
53. How many goals of agriculture are mentioned in the passage?
A. Three           B. Four            C. Five             D. Six
54. Which is true according to the passage?
A. Organic agriculture can feed most people in the world now.
B. Industrialized agriculture does no harm to our environment.
C. Modern farming is criticized while organic farming is not.
D. The future agriculture can’t only depend on organic agriculture.
55. We can learn from the passage that _______.
A. everyone can afford to enjoy organic food at will
B. we will vote to decide which farming system to take
C. the writer is quite optimistic about future agriculture
D. only experts can find a better agricultural solution
56. What’s the best title for the passage?
A. Organic Agriculture Vs. Industrialized Agriculture.          
B. The Goals of Future Agriculture and Its Way Out.      
C. A Third Possible and Necessary Way for Agriculture.
D. Modern Globalized and Industrialized Agriculture.