A Battery’s Nightmare
Portable electronics that can be carried about easily are only as good as their batteries (电池) and, let’s face it, batteries aren’t very good, especially when compared with, say, petrol, which packs 100 times a battery’s energy into an equal space. That’s why a large group of mechanical engineers (centered at the Massachusetts Institute of Technology, but with partners at other universities and companies) are hard at work in an effort to replace batteries with a tiny engine that runs on fuel. Imagine a battery-free life! When the fuel runs out in your mobile phone, you just fill up and go.
The engine---about the size of a ten-cent coin---starts with a combustion chamber (燃烧室) that burns hydrogen. Its tiny parts are etched (蚀刻) onto silicon wafers (硅片) in the same manner that computer parts are etched onto integrated circuits (集成电路). The first engine is made up of five wafers. And since these wafers could be produced in much the same way as computer chips, they could probably be produced quite cheaply.
But the devil in all this nice detail is efficiency. Tiny engine parts don’t always behave like the bigger parts of the first engine. Something between the parts can slow down the works, according to Columbia University Professor LucFrechette, one of the engine’s designers. Extreme heat from the combustion chamber is also a problem, often leaking to other parts of the engine.
The scientists’ goal is to create an engine that will operate 10 times better than batteries operate. Frechette says that a complete system, with all parts in place and working, will be set up in the next couple of years, but commercial models aren’t likely until at least the end of the next ten years.
60. According to the passage, the title suggests that _______ .
A. batteries should be greatly improved
B. petrol will be used instead of batteries
C. the time of batteries will be gone forever
D. pollution problems caused by batteries must be solved
61. What’s the meaning of the underlined word “devil” in paragraph 3?
A. Problem B. Advantage C. Invention D. Technique
62. What can we infer from the passage?
A. The new invention doesn’t need any fuel.
B. The new engine has been produced in large quantities.
C. The new invention is much cheaper than the battery.
D. The new engine needs to be improved before it’s on sale.
The other morning on the subway I sat next to an attractive young blonde woman who was reading something on her iPad. She was very well-dressed, carrying a Prada bag with tastefully applied make-up indeed, she had an unmistakable air of wealth, material success and even authority. I suspected she worked as a highly-paid Wall Street lawyer or stockbroker or something of that sort. So, I was curious to see what she was so focused on. The Wall Street Journal perhaps? The Economist?
Quite the contrary; rather, she was concentrating on a romance novel. Then I realized that I have known many women who love romance novels—smart, attractive, successful, “liberated,” modem females who nonetheless find some kind of deep satisfaction and thrill from those hyper-romantic, artificial and extremely unrealistic tales of handsome, manly heroes falling in love with virginal women, enduring a series of adventures, then no doubt having a happy ending.
These romance stories are to literature what hot dogs are to fine food. Yet, the genre(体裁) remains enormously popular. Consider some of these surprising statistics from the good folks at the Romance Writers of America (RWA):
*More than 9,000 romance titles were released last year, with sales of about $1.44 billion (more than triple the revenues generated by classic literary fiction).
*More than 90 percent of the market are women (okay, that’s not at all surprising).
* Readers are typically women between the ages 30 and 54 who are themselves involved in a romantic relationship (betraying the stereotype that only lonely women long for these tales of love and adventure).
*Almost 40 percent of romance book consumers have an annual income of between $50,000 and $99,900 (placing them firmly in the middle class).
I had thought that romance novels accounted for a very small share of the literary market, so I was quite surprised that this part has such enormous popularity. But I must wonder why so many women—forty years after the women’s liberation movement continue to indulge in the fanciful tales?
I’m not sure if it represents a kind of “rejection” of the women’s liberation movement, but clearly something is missing in the lives of contemporary ladies. A romance author named Donna Hatch who focuses on the Regency period (early 19th century Britain) explained the appeal of such books this way: “Regency men were civilized and treated women with courtesy. When a lady entered the room, gentlemen stood, doffed their hats, offered an arm, bowed, and a hundred other little things I wish men still did today. But they were also very athletic; they hunted, raced, boxed, rode horses. They were manly. Strong. Noble. Honorable. And that is why I love them!”
Mrs. Hatch may have expressed the secret desires and attitudes of untold millions of her peers---that is, in the early 21st century, have women grown tired of the burdens and expectations that the “freedoms” they have gained give them? Is this a rejection of modem feminism? Do women long for days of old when men were masculine gentlemen and women were feminine and protected as precious treasures and regarded as possessions?
Perhaps most women (even the ones who get lost in romance novels) do not want to go all the way back but it is obvious,.What is the function of the opening paragraph?
| A．To summarize the whole passage. |
| B．To prove the author’s argument. |
| C．To lead in the main topic of the passage. |
| D．To raise problems that will be solved later. |
What does the underlined sentence in the third paragraph imply?
| A．Romance novels are satisfying and thrilling. |
| B．Romance novels are not of much “nutrition”. |
| C．Romance novels are as popular as hot dogs. |
| D．Romance novels are an essential part of contemporary life. |
In the author’s opinion, what is missing in the lives of contemporary women?
| A．Authority. | B．Dignity. |
| C．Liberty. | D．Care. |
Which sentence can be put in the blank in the last paragraph?
| A．they prefer tales of innocent romance to classics |
| B．they are unhappy with how the world has turned out |
| C．true love described in romance novels does exist in reality |
| D．romance novels provide them with an access to society |
Metropolitan North Georgia Water Planning District
2015 High School Video Contest
Here’s the Scoop on Pet Waste!
Submission Deadline March 27, 2015.
| Eligibility Ninth, tenth, eleventh and twelfth grade students that attend schools located in Bartow, Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Fulton, Forsyth, Gwinnett, Hall, Henry, Paulding and Rockdale counties are invited to participate in the video contest. Entries can be a team or individual effort. Guidelines » Each video must be uploaded to YouTube. The video’s YouTube link must be included in the entry/release form. » Team members must be from the same school. » The video must be between 30-60 seconds in length. » No professional assistance or use of copyright material is allowed, including background music. » Each student participating in the contest or appearing in the video must fill out a form. For teams, submit an entry/release form for each team member. » One video per team or individual. » All entry/release forms must be postmarked or received by Friday, March 27, 2015. Email: kvaIlianos@atlantaregional.com OR Mail: 2015 Water Video Contest Metro Water District 40 Courtland Street, NE Atlanta, GA 30303 |
Judging Submissions will be judged based on the following criteria: » incorporation of the “Here’s the Scoop on Pet Waste’’ message. Use the "Here's the Scoop on Pet Waste’’ messaging fact sheet for background information on the issue. » Composition (length, technical construction, audio quality). » Entertainment value. » Accuracy of information. » Creativity. Prizes » 1st Place $1500 » 2nd Place $1000 »3rd Place $500 50% of the prize money will go to the individual or team who submits the video and 50% to the high school they attend. Winners will be notified directly.  |
| Page 1 of 3 www.northgeorgiawater.org |
What does the underlined word “Eligibility” probably mean?
| A．Age. | B．Qualification. |
| C．Location. | D．Grade. |
When entering the contest, ________.
| A．one must ask his or her teacher to sign the entry form |
| B．winners can earn at least $750 as a prize |
| C．one can invite friends from other schools to act in the video |
| D．participants had better add some humor and fun to the video |
A glass a day keeps obesity at bay. Alcohol has always been thought to cause weight gain because of its high sugar content, but new research suggests a glass a day could form part of a diet. Looking at past studies they found that, while heavy drinkers do put on weight, those who drink in moderation can actually lose weight.
A spokesman for the research team at Navarro University in Spain says, “Light to moderate alcohol intake, especially of wine, may be more likely to protect against, rather than promote, weight gain”. The International Scientific Forum on Alcohol Research reviewed the findings and agreed with most of the conclusions, particularly that current data do not clearly indicate if moderate drinking increases weight.
Boston University’s Dr. Harvey Finkel found that the biologic mechanisms (生物学机制) relating alcohol to changes in body weight are not properly understood. His team pointed out the strong protective effects of moderate drinking on the risk of getting conditions like diabetes(糖尿病)，which relate to increasing obesity. Some studies suggest that even very obese people may be at lower risk of diabetes if they are moderate drinkers.
The group says alcohol provides calories that are quickly absorbed into the body and are not stored in fat, and that this process could explain the differences in its effects from those of other foods. They agree that future research should be directed towards assessing the roles of different types of alcoholic drinks, taking into consideration drinking patterns and including the past tendency of participants to gain weight.
For now there is little evidence that consuming small to moderate amounts of alcohol on a regular basis increases one’s risk of becoming obese. What’s more, a study three years ago suggested that resveratrol, a compound present in grapes and red wine, destroys fat cells.
The passage is mainly for those ______.
| A．who produce wine |
| B．who are eager to lose weight |
| C．who go on a diet |
| D．who have a drinking habit |
The underlined phrase “in moderation” in the first paragraph means ______.
| A．properly | B．carefully |
| C．excitedly | D．frequently |
Why has alcohol been thought to cause weight gain?
| A．Because its calories are stored in fat. |
| B．Because it is rich in sugar. |
| C．Because it changes drinking patterns. |
| D．Because it increases the risk of diabetes. |
What can we learn from the passage?
| A．The specific roles of different types of alcoholic drinks are very clear. |
| B．Resveratrol is proved to increase the risk of becoming fat. |
| C．The research found moderate drinking has a strong protective effect. |
| D．Current data clearly show that moderate drinking increases weight. |
What is most likely to be discussed in the paragraph that follows?
| A．How to do some easy experiments. |
| B．How to prove the finding mentioned above. |
| C．How to make wine in a healthy way. |
| D．How to reduce the calories contained in wine. |
In my first week as a graduate student at Cambridge University in 1964 I met with a fellow student, two years ahead of me in his studies; he was unsteady on his feet and spoke with great difficulty. This was Stephen Hawking. I learned that he had a bad disease and might not live long enough even to finish his PhD degree.
But, amazingly, he has reached the age of 73. Even mere survival would have been a medical miracle, but of course, he didn’t merely survive. He has become arguably the most famous scientist in the world for his brilliant research, for his bestselling books, and, above all, for his astonishing victory over hardship.
Stephen received his “death sentence” in 1964, when I thought it was hard for him to go on with his study. Stephen went from Albans School to Oxford University. He was said to be a “lazy” undergraduate, but his brilliance earned him a first-class degree, an “entry ticket” to a research career in Cambridge and a uniquely inspiring achievement.Within a few years of the burst of his disease he was wheelchair-bound, and his speech was so unclear that it could only be understood by those who knew him well. But his scientific career went from strength to strength: he quickly came up with a series of insights into the nature of black holes (then a very new idea) and how the universe began. In 1974 he was elected to the Royal Society at the exceptionally early age of 32.
The great advances in science generally involve discovering a link between phenomena that were previously conceptually unconnected — for instance, Isaac Newton realized that the force making an apple fall to earth was the same as the force that holds the moon and planets in their orbits. Stephen’s revolutionary idea about a link between gravity and quantum(量子) theory has still not been tested. However, it has been hugely influential; indeed, one of the main achievements of string theory(弦理论)has been to confirm and build on his idea. He has undoubtedly done more than anyone else since Einstein to improve our knowledge of gravity and he is one of the top-ten living theoretical physicists.
What impressed the author most about Stephen Hawking?
| A．His brilliant research. | B．His bestselling books. |
| C．His serious disease. | D．His defeating hardship. |
What made Stephen Hawking start his research career at Cambridge?
| A．His death sentence. |
| B．His “lazy” attitude. |
| C．His above-average talent and ability. |
| D．His rich experience. |
It can be inferred that Stephen Hawking was born.
| A．in the early 1940s | B．in the late 1940s |
| C．in the early 1930s | D．in the late 1930s |
What can we learn from the text?
| A．Hawking’s theory was proved years ago. |
| B．Hawking was not as successful as Newton. |
| C．String theory built on Hawking’s idea. |
| D．Hawking’s theory has had little influence on others. |
Which of the following is Not True according the passage?
| A．He achieved one success after another in his career despite his disease. |
| B．He couldn’t walk when the author first met him at Cambridge. |
| C．He not only survived his disease but contributed greatly to science. |
| D．He is among the greatest scientists to improve the knowledge of gravity. |
Sina Weibo, one of the country’s most popular micro-blogging sites, has launched a paid service. For a 10 yuan ($ l.57) monthly fee, users get a membership on their Sina Weibo accounts.
According to Xu Yuanyuan, a member of the marketing team at Sina, the move is to guarantee a more convenient and safer environment for users. But despite the company’s efforts to increase income, it seems that most of its 300 million users still prefer the free version.
The premium membership (高级会员) plans ,announced by the company on Monday, brought about negative comments from its users .
“The current service is good enough for me”, said a Beijing-based micro-blogger. “I don’t really need those value-added services and it might be a waste of money. I might consider paying for it if some more features are added.”
Dong Xu, an analyst with consulting firm Analysys International, said that Sina shouldn’t expect a great increase in income brought by the new services. The free services are enough for most users, Dong said. “The company has been making attempts at different profit models since last year. A potential source of income could be gaming. Games and advertisements are so far the two biggest sources of income.” she said.
Other micro-blogging service providers have not yet followed suit. Fang Gang, vice-president of rival Sohu, said via e-mail on Tuesday that Sohu’s micro-blogging service will never charge users. “It’s good news for us. Users can come to our website if they have to pay for services (at Sina).” Fang said.
Most of Sina Weibo’s users______.
| A．aren’t satisfied with its free version |
| B．show no interest in its paid services |
| C．are looking forward to new services |
| D．think highly of its new paid version |
What’s Dong Xu’s attitude towards Sina Weibo’s new services increasing income?
| A．Negative. | B．Confident . |
| C．Indifferent. | D．Positive . |
Why did Fang Gang consider Sina Weibo’s charging its users good news?
| A．Because Sina will make more money. |
| B．Because Sina will lose the whole Weibo market. |
| C．Because Sohu will attract more users. |
| D．Because Sohu will offer free services. |
What can be inferred from the text?
| A．Most of Weibo websites will charge their users. |
| B．Sina Weibo’s new move will be a great success. |
| C．Sina Weibo’s users will enjoy more services. |
| D．A large number of Weibo users like playing games. |
What can be the best title for the text?
| A．Sina Weibo Faces Great Challenges |
| B．Sina Weibo Launches Paid Services |
| C．Sina Weibo Expects Income Increase |
| D．Sina Weibo Becomes More Convenient |