If you are afraid of the dark，it’s not a big deal．It’s perfectly normal to feel afraid. After all，animals do too. “Fear matters，”says Karen Warkentin，an ecologist．“It’s a good thing，” she adds, “because fear makes you do things that keep you alive.”
Like kids，many animals experience fear and they respond to the feeling in a variety of ways．A frightened turtle pulls its head and legs inside its shell．A small fish will swim away when a big，hungry fish approaches．
Some animals respond to fear in ways you might not expect．The first example is that the fear of being eaten can scare some frogs right out of their eggs. Warkentin made the surprising discovery while studying red—eyed tree frogs in Costa Rica.
In this species，female frogs attach jellylike clumps（果冻一样的块状物）of their eggs to the undersides of leaves．The leaves hang on branches that dangle（悬挂）over ponds．After they hatch from the eggs，the tadpoles（蝌蚪）then fall into the water，where they eventually grow into adult frogs.
Tree frog eggs usually grow for 6 days before hatching．If they sense that a hungry snake is about to attack，however，they can hatch up to 2 days ahead of schedule. As the snakes are unable to swim，by falling into the water early，the tadpoles can escape.
If hatching early helps protect red—eyed tree frogs from snakes，you might wonder why their eggs don’t always hatch sooner．It turns out that hatching early brings its own danger．Once tadpoles land in the water，hungry fish and other animals like to eat them too．Staying in their eggs for a full 6 days, then, allows frog embryos（胚胎）to grow big and strong．This extra growth improves their chances of surviving in the water．
1．It can be inferred from the passage that fears________.
A．help animals grow bigger and stronger
B．are less common among young animals
C．help animals move a lot to fit the environment
D．are more or less important in order for animals to survive
2．We are told in the passage that tree frogs _______.
A．face danger both inside their eggs and in the water
B．will grow fast if they fall into the water later
C．are surprisingly clever when inside their eggs
D．stay in their eggs longer if they are frightened
3．What do you think would be discussed in the following paragraph?
A．Further explanations as to why tree frogs hatch ahead of schedule．
B．How the unborn frogs know when a snake is about to attack them．
C．Another example of animals that responds to fear in an unexpected way．
D．How tree frogs improve their chances of survival before falling into the water.
LONDON - A British judge on Thursday sentenced a businessman who sold fake(假冒的) bomb detectors(探测器) to 10 years in prison, saying the man hadn't cared about potentially deadly consequences.
It is believed that James McCormick got about $77.8 million from the sales of his detectors - which were based on a kind of golf ball finder - to countries including Iraq, Belgium and Saudi Arabia.
McCormick, 57, was convicted(判罪) of cheats last month and sentenced Thursday at the Old Bailey court in London.
"Your cheating conduct in selling a great amount of useless equipment simply for huge profit promoted a false sense of security and in all probability materially contributed to causing death and injury to innocent people," Judge Richard Hone told McCormick. "you have neither regret, nor shame, nor any sense of guilt."
The detectors, sold for up to $42,000 each, were said to be able to find such dangerous objects as bombs under water and from the air. But in fact they "lacked any grounding in science" and were of no use.
McCormick had told the court that he sold his detectors to the police in Kenya, the prison service in Hong Kong, the army in Egypt and the border control in Thailand.
"I never had any had results from customers," he said.Why was McCormick sentenced to prison?
| A．He sold bombs. | B．He caused death of people. |
| C．He made detectors. | D．He cheated in business. |
According to the judge, what McCormick had done _______.
| A．increased the cost of safeguarding |
| B．lowered people's guard against danger |
| C．changed people's idea of social security |
| D．caused innocent people to commit crimes |
Which of the following is true of the detectors?
| A．They have not been sold to Africa. |
| B．They have caused many serious problems. |
| C．They can find dangerous objects in water. |
| D．They don't function on the basis of science. |
It can be inferred from the passage that McCormick _______.
| A．sold the equipment at a low price |
| B．was well-known in most countries |
| C．did not think he had committed the crime |
| D．had not got such huge profit as mentioned in the text |
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 12-year-old 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 swan 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 30minutes, 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. |
| 1． |
What you have just read is a.
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| 2． |
What is going to take place on 2 February, 2013?
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| 3． |
How much do you have to pay in total if four of you go together?
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| 4． |
Which of the following statements is true?
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A study of more than five million books, both fiction and non-fiction, has found a marked decline in the use of emotional words over time. The researchers form the University of Bristol used Google Ngram Viewer, a facility for finding the frequency of terms in scanned books, to search for more than 600 particular words identified as representing anger, dislike, fear, joy, sadness and surprise.
They found that almost all of the categories (类别) showed a drop in these “mood words” over time. Only in the category of fear was there an increase in usage.
“It is a steady and continuous decrease,” said Dr Alberto Acerbi. He assumed that the result might be explained by a change in the position occupied by literature, in a crowded media landscape. “One thing could be that in parallel to books the 20th century saw the start of other media. Maybe these media—movies, radio, drama—had more emotional content than books.”
Although both joy and sadness followed the general downwards trend, the research, published in the journal PLOS One, found that they also exhibited another interesting behaviour：the ratio (比率) between the two varied greatly, apparently mirroring historical events.
During the Roaring Twenties the joy-to-sadness ratio reached a peak that would not occur again until before the recent financial crash. But the ratio plunged at the height of the Second World War. Nevertheless, the researchers held a reserved opinion about their claim that their result reflected wider social trends. In the paper, they even argue that the reverse could be true.
“It has been suggested, for example, that it was the suppression (压抑) of desire in ordinary Elizabethan English life that increased demand for writing ‘filled with romance and sex’… perhaps,” they conclude, “songs and books may not reflect the real population any more than catwalk models reflect the average body.”
(Note：Answer the questions or complete the statements in NO MORE THAN TEN WORDS.)A study of more than five million books indicated a decline in “mood words” over time except
According to Dr Alberto Acerbi, one reason for the drop of “mood words” in books may be that
What were the two periods when the joy-to-sadness ratio was at its highest?
While the researchers found some changes in the use of “mood words” in books, they werenot sure that
A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.
“It’s extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components (元件),” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.
They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it’s connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.
While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers’ fields or on the battlefield. “Basically it should be able to take off, land and fly around,” he said.
Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”
(392 words)The difficulty the team of engineers met with while making the robotic fly was that __________.
| A．they had no model in their mind |
| B．they did not have sufficient time |
| C．they had no ready-made components |
| D．they could not assemble the components |
It can be inferred from paragraphs 3 and 4 that the robotic fly __________.
| A．consists of a flight device and a control system |
| B．can just fly in limited areas at the present time |
| C．can collect information from many sources |
| D．has been put into wide application |
Which of the following can be learned from the passage?
| A．The robotic flyer is designed to learn about insects. |
| B．Animals are not allowed in biological experiments. |
| C．There used to be few ways to study how insects fly. |
| D．Wood’s design can replace animals in some experiments. |
Which of the following might be the best title of the passage?
| A．Father of Robotic Fly |
| B．Inspiration from Engineering Science |
| C．Robotic Fly Imitates Real Life Insect |
| D．Harvard Breaks Through in Insect Study |