The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators.
Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for million of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.
All living cells send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends our brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small，often so small that sensitive instruments are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are linked together, the effects can be astonishing.
The electric eel is an amazing storage battery. It can send a jolt of as much as eight hundred volts of electricity through the water in which it lives. ( An electric house current is only one hundred and twenty volts, but two hundred and twenty volts in China.) As many as four-fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to length of its body
56. Electricity was invented ______.
A. when man had no candles
B. about 200 years ago
C. to be operating computers.
D. by Thomse Edison
57. The following things can send out pulses of electricity except______.
A. electric eels and human hearts.
B. Electrical generators and animal muscle.
C. Stones and dry wood.
D. human brain and living cells.
58. The electric current send out by an eel can be
A. as much as 800 volts. B. about one hundred and twenty volts.
C. as high as the house current in China. D. stored in the water where it lives.
59. From this shot passage we can infer _____.
A. the shorter an eel is, the stronger electricity it produces.
B. we can always feel the electricity produced by living cells.
C. human beings get their knowledge about electricity from nature.
D. people learn about electricity from eels.
What would it be like to take a walk on the surface of Mars? If you could design the tallest building in the world, what would it look like? Do you dream of being the next J．K. Rowling? This summer, you can experience all of these things, and more. All you need is an Internet connection and your imagination.
A recent study by the Kaiser Family Foundation found that kids spend an average of 1 hour and 29 minutes online each day. Many kids like to use that time to chat with friends, play games or check emails. But the next time you get on the Web, try exploring the world instead. “With the Internet, you can go back 11,000 years in time, or go 11,000 kilometers across the planet.” said Russell, Web search expert of Google. “The whole scope of history and the world is open to you.”
There is a wealth of information to be found online. For example, if your family is going on vacation somewhere，do a quick online search on the area before you even get in the car. “What's the background of the place; what's the history？” says Russell. “I like to tell my kids, ‘Whenever you have a question, whenever you have a doubt, search it out.’”
Ready to launch a virtual journey of your own? Here are a few starting points to get you thinking and to help you on your way. You can invite your parents along for the ride, too. Always ask for permission before downloading programs and software onto your computer. And check with a parent or an adult before visiting a new Web site.
Navigate the world in 3D with Google Earth. Begin in outer space and zoom(快速移动) into the streets of any city, from Hong Kong to San Francisco. Or visit ancient monuments, watch the changing rainforests over time, and dive underwater to explore tropical reef.
With the Moon in Google Earth tool, you can walk in Neil Armstrong's famous footsteps. Take a guided tour of the moon's surface with Armstrong's fellow shuttle mate astronaut Buzz Aldrin.
When you're exploring that part of the solar system, hop on over to the Red Planet with Google Mars. There, you can move very quickly around the surface and see images from the Mars Rovers.The author uses questions in the first passage to ________.
| A．introduce the topic of the paragraph |
| B．question the possibility of realizing the dream |
| C．attract the readers' attention |
| D．let the readers answer it |
How do you travel around the world in a day according to the passage?
| A．By taking the time shuttle. |
| B．By making use of the Internet |
| C．By watching 3D films. |
| D．By finding a tourism company in Google. |
Russell thought ________.
| A．the students spent too much time on the Internet |
| B．the students shouldn't chat and play games online |
| C．the students could solve their problems through the line |
| D．the students should learn knowledge instead of chatting online |
What's the purpose of the passage?
| A．Encourage the kids to spend more time online. |
| B．Encourage the kids to do some research on science. |
| C．Encourage the kids to learn to use the computer. |
| D．Encourage the kids to explore the world online. |
The best of Bali in 48 hours
Bali(巴厘岛) is home to most of Indonesia's Hindu minority. Here's how to get the most out of a 48hour visit：
FRIDAY
3pm—There's nothing like a good meal. La Lucciola is the place to go, with its good food, great service and a beautiful view of the sea.
You can hire a car for some 450,000 rupiah per day. This will help you have more to spare during your trip there.
5pm—About an hour away from La Lucciola is Uluwatu. This southern tip of the island is famous for its temple that lies on the edge, high above the sea. Fire dance is performed here daily at sunset.
8pm—To finish off the evening, head to Jimbaran Bay where restaurants offer candles, dances, boys singing songs. Kick off your shoes, feel the sand, and enjoy the night.
SATURDAY
9：30am—Start the day with another taste of culture by heading for a “barong and keris” dance performance. It's held in many places. One is the Catur Eka Budi in Denpasar, capital of Bali.
12pm—About 50km from Denpasar is Kintamani, a favorite with tourists for the view of active volcano Mt. Batur. It's a good idea to reach Kintamani early as it gets cloudy after 3pm. Have lunch at a local restaurant with a view of Mt. Batur. Tourists can climb to Mt. Batur to catch the sunrise.
6：30pm—Spa(温泉疗养)time! Spa Hati is a good place. Book ahead.
SUNDAY
6am—It's time to go to the sea. Don't forget the camera.
10：30am—Another halfday trip to two of the most famous temples in Bali. Drive down to the Taman Ayun temple at Mengwi.
12am—Next up is the Tanah Lot temple, perhaps the most famous of them all. Built on a rock, it's best seen in the afternoon when it's against the sun or at sunset.How can you save time during your trip in La Lucciola according to the text?
| A．Having a pair of good shoes. |
| B．Preparing early and well. |
| C．Joining a tour group. |
| D．Hiring a car. |
Where can you enjoy fire dance?
| A．In La Lucciola. | B．In Uluwatu. |
| C．At Mengwi. | D．In Denpasar. |
Which of the following is probably a better time to visit the famous temple built on a rock?
| A．5 am. | B．4 pm. | C．11 am. | D．9 pm. |
Which of the following needs to be booked in advance?
| A．Joining in a “ barong and keris” dance. |
| B．Visiting the Tanah Lot temple. |
| C．Having a spa in Spa Hati. |
| D．Having lunch in Kintamani. |
We chat with our colleagues all the time when we have lunch, gossip in the tearoom, or leave work together. Sharing your personal life brings you closer to your coworkers and builds trust within your team. But revealing too much about yourself to colleagues, managers or human resources staff can cause difficulties and even endanger your work.
It's important to keep the right balance between getting along with colleagues and maintaining your privacy. “Communication in the office is tricky and complicated. You can neither spread chatter, nor be too silent and shut yourself off from others，” said Yang Yudan, deputy HR director at P&G.
According to her, there are several safe topics to talk about with colleagues during the break, such as the weather or movies. Women like to talk about makeup and clothing, while men are fond of sports and online games. But discussing your private life, such as relationship, habits or health conditions, is a potential minefield.
Liang Kun, 26, had to resign from his job at a trading company in Guangzhou last week after discussing his income with colleagues during a lunch break. “I didn't realize it was such a serious issue until a senior member of staff went to find the boss, asking why I got a higher salary than her，” said Liang. “Then our HR told me that according to the employee handbook it is forbidden to talk about salary in the office.” HR expert Yang also reminds us that paychecks are your own business. It is unwise to share this information with others, no matter how close you are.
To summarize, Yang advises office workers to be more aware of the image they project when talking to colleagues, “When you share your personal life, it will be recorded on your invisible resume and may slow down your career progressing.”The author quoted Yang Yudan in the text to ________.
| A．show his admiration for her |
| B．make an argument with her |
| C．support his own viewpoint |
| D．build up his fame |
What can be inferred from the fact that Liang Kun had to resign his job according to the text?
| A．It was unwise for him to share information with others. |
| B．He broke the rules made by the company. |
| C．He was such an honest person that he told the truth. |
| D．He treated his colleagues as family members. |
What is the author's purpose in writing the text?
| A．To draw people's attention to their behaviors in public. |
| B．To advise office workers to be aware of the image they project. |
| C．To make you believe that communication in the office is complicated. |
| D．To warn you to be careful of invisible trouble while talking about your privacy to colleagues. |
Which would be the best title for the text?
| A．At Work, Keep It to Yourself |
| B．Keep the Right Balance |
| C．Share Your Personal Life with Others |
| D．Safe Topics to Talk about |
“It is one of the few bright spots in the Chinese economy，” says Zeng Ming. He is talking about ecommerce. Mr. Zeng, the chief strategy officer for Alibaba, a giant Chinese Internet firm, predicts that digital transactions on his firm's platforms will top 1 trillion yuan($159 billion) this year—more than Amazon's and eBay's combined. That is a bold claim, but consider what happened on Singles Day.
Invented a few years ago by students and seized upon by digital marketers, this festival for lonely hearts falls annually on the 11th day of the 11th month(since 1 is the loneliest number). It is like St Valentine's Day, only worse. Singletons show each other with tender gifts: a barrage of pearls; a storm of sweets.
This November 11th they spent a surprising 19 billion yuan on Alibaba's online platforms—a fourfold increase on a year ago, and more than double what Americans spent online last Cyber Monday(the Monday after Thanksgiving, when retailers urge Americans to shop online). About 100 million purchases were logged, accounting for 80% of the packages shipped that day. Couriers(快递员) were buried in parcels.
So life is good for China's etailers. Then? Not exactly. The number of digital marketers is increasing and online sales are booming. Consumers are enjoying lower prices, better service and more variety. The problem? The pressure on profits in Chinese ecommerce is worse than in America, reckons Elinor Leung of CLSA, a broker. “Almost no one makes money，” she says.
The fiercest battles are being fought between online retailers and their bricksandmortar(实体的) rivals. Dangdang, a firm that resembles Amazon, and 360buy, another online retailer, have cut prices fiercely. Tencent, a cashrich online giant known for its instantmessaging software, is splashing out to win market share. 360buy has also just raised $400 millon from investors to do the same. But it is unclear how much longer such firms can burn through capital. What's the best title of this passage?
| A．The Ambition of Alibaba |
| B．Fierce Competition between Retailers |
| C．A New Festival for the Singles |
| D．Chinese Booming Ecommerce |
According to Zeng Ming, this year Alibaba will ________.
| A．outweigh Amazon and eBay in worldwide influence |
| B．rank top among all the Internet firms |
| C．have more than 159 billion dollars' sale |
| D．create another sales miracle just like the one on Singles Day |
How many packages were shipped on November 11th from Alibaba's online platforms?
| A．About 80 million. | B．About 100 million. |
| C．About 125 million. | D．About 180 million. |
What's the author's attitude towards online retailers in China?
| A．Optimistic. | B．Concerned. |
| C．Sympathetic. | D．Indifferent. |
On a sunny day last August, Tim heard some shouting. Looking out to the sea carefully, he saw a couple of kids in a rowboat were being pulled out to sea.
Two 12yearold boys, Christian and Jack, rowed out a boat to search for a football.Once they'd rowed beyond the calm waters, a beach umbrella tied to the boat caught the wind and pulled the boat into open water.The pair panicked and tried to row back to shore.But they were no match for it and the boat was out of control.
Tim knew it would soon be swallowed by the waves.
“Everything went quiet in my head，” Tim recalls(回忆)．“I was trying to figure out how to swim to the boys in a straight line.”
Tim took off his clothes and jumped into the water.Every 500 yards or so, he raised his head to judge his progress.“At one point, I considered turning back，” he says.“I wondered if I was putting my life at risk.” After 30 minutes of struggling, he was close enough to yell to the boys, “Take down the umbrella！”
Christian made much effort to take down the umbrella.Then Tim was able to catch up and climb aboard the boat.He took over rowing, but the waves were almost too strong for him.
“Let's aim for the pier(码头)，” Jack said.Tim turned the boat toward it.Soon afterward, waves crashed over the boat, and it began to sink.“Can you guys swim？” he cried.“A little bit，” the boys said.
Once they were in the water, Tim decided it would be safer and faster for him to pull the boys toward the pier.Christian and Jack were wearing life jackets and floated on their backs.Tim swam toward land as water washed over the boys' faces.
“Are we almost there？” they asked again and again.“Yes，” Tim told them each time.
After 30 minutes, they reached the pier.Why did the two boys go to the sea?
| A．To go boat rowing. |
| B．To get back their football. |
| C．To swim in the open water. |
| D．To test the umbrella as a sail. |
What does “it” in Paragraph 2 refer to?
| A．The beach. | B．The water. |
| C．The boat. | D．The wind. |
Why did Tim raise his head regularly?
| A．To take in enough fresh air. |
| B．To consider turning back or not. |
| C．To check his distance from the boys. |
| D．To ask the boys to take down the umbrella. |
How did the two boys finally reach the pier?
| A．They were dragged to the pier by Tim. |
| B．They swam to the pier all by themselves. |
| C．They were washed to the pier by the waves. |
| D．They were carried to the pier by Tim on his back. |