As in the field of space travel, new technologies continue to appear in undersea exploration. They share a number of similarities with each other — as well as some important differences.

Manned submersibles (潜水器), like spaceships, must maintain living conditions in an unnatural environment. While a spaceship must simply be sealed against the vacuum space, a submersible must be able to bear extreme pressure if it is not to break up in deep water.

In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other hand, men paved the way, and only recently have unmanned remote-operated vehicles (ROVs) been put to use.

One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater. A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles — particularly ROVs — operate at the end of long ropes.(电缆终端)

For a similar reason, knowing where you are undersea is much more difficult than in space. A spaceship’s position can be located by following its radio signal, or by using telescopes and radar. For an undersea vehicle, however, a special network of sonar （声纳系统）devices must be laid out in advance on the ocean floor in the area of a dive to locate the vehicle’s position.

Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity. Thus, it remains far less expensive.

1.The purpose of the passage is ______.

2. By saying “men paved the way” in Paragraph 2 the author means that in undersea exploration ______.

3.The sonar devices must be placed ______.

4.What can we infer from the passage?

I am a writer. I spend a great deal of my time thinking about the power of language—the way it can evoke（唤起） an emotion, a visual image, a complex idea, or a simple truth. Language is the tool of my trade. And I use them all—all the Englishes I grew up with.

Born into a Chinese family that had recently arrived in California, I’ve been giving more thought to the kind of English my mother speaks. Like others, I have described it to people as “broken” English. But feel embarrassed to say that. It has always bothered me that I can think of no way to describe it other than “broken”, as if it were damaged and needed to be fixed, as if it lacked a certain wholeness. I’ve heard other terms used, “limited English,” for example. But they seem just as bad, as if everything is limited, including people’s perceptions（认识）of the limited English speaker.

I know this for a fact, because when I was growing up, my mother’s “limited” English limited my perception of her. I was ashamed of her English. I believed that her English reflected the quality of what she had to say. That is ,because she expressed them imperfectly her thoughts were imperfect. And I had plenty of evidence to support me: the fact that people in department stores, at banks, and at restaurants did not take her seriously, did not give her good service, pretended not to understand her, or even acted as if they did not hear her.

I started writing fiction in 1985. And for reasons I won’t get into today, I began to write stories using all the Englishes I grew up with: the English she used with me, which for lack of a better term might be described as “broken”, and what I imagine to be her translation of her Chinese, her internal（内在的） language, and for that I sought to preserve the essence（本质）, but neither an English nor a Chinese structure: I wanted to catch what language ability tests can never show; her intention, her feelings, the rhythms of her speech and the nature of her thoughts.

1.By saying “Language is the tool of my trade”, the author means that ______.

A. she uses English in foreign trade             B. she is fascinated by languages

C. she is a writer by profession                   D. she works as a translator

2. The author used to think of her mother’s English as ______.

A. impolite           B. amusing           C. imperfect          D. practical

3.Which of the following is TRUE according to Paragraph 3?

A. Americans do not understand broken English.

B. The author’s mother was not respected sometimes.

C. The author’ mother had positive influence on her.

D. Broken English always reflects imperfect thoughts.

4.What is the passage mainly about?

A. The limitation of the author’s perception of her mother.

B. The changes of the author’s attitude to her mother’s English.

C. The author’s misunderstanding of “limited” English.

Roger Federer and Serena Williams have been named as 2009' s world champions by the International Tennis Federation（ITF） after topping the year-end rankings．

         Federer, who wins the honour for the fifth time, completed a career Grand Slam（大满贯）at Roland Garros before winning his 15th Grand Slam ride at Wimbledon．

         And Williams won the Australian Open and Wimbledon, her llth major success．

         The pair will receive their awards at the annual 1TF world champions dinner in Paris in June．

         Federer regained the world number one ranking from Rafael Nadal after his Paris victory and his Wimbledon win over Andy Roddick saw him surpass Pete Sampras' haul of Grand Slam titles．

       He was also runner - up at the Australian Open and the US Open and helped his country retain its Davis Cup world group status．

         " It is an honour for me to be named ITF world champion for a fifth time．It was an incredible （不可思议的） year for me both on and off the court," said the 28 - year - old Swiss star whose wife Mirka gave birth to twin girls in July．

         "To win my first Roland, Garros title, break the all - time Grand Slam record and regain the number one ranking is amazing．It means a lot to me to finish the year again at the top．"

         Williams takes the award for the first time since 2002．As well as her Grand Slam wins,            she won the season - ending WTA Championships in Doha．sealing the top ranking in the last event of the year．

         She also took the doubles year award with sister Venus after taking their career total to 10 Grand Slam titles．In doing so, she joins Lindsay Davenport and Martina Hingis as the only players to become singles and doubles world champions in the same year．

         American twins Bob and Mike Bryan were named as the men' s doubles world champions for the sixth time in seven years．

1.What's the main idea of the text?

         A．Roger Federer got his fifth world champions．

         B．Serena Williams was named the ITF world champion．

         C．Williams & Federer were named 2009' s world champions．

．     D．Roger Federer won his first Roland Garros title．

2.What does Federer mean by saying that it was an incredible year for him off the court?

         A．He made a lot of money．                                          

         B．His wife gave birth to twin girls．

         C．He regained the world No.One ranking．

         D．He got a Grand Slam title at Roland Garros．

3.In which country might Roland Garros Open take place?

         A．France．   B．Australia C．The United States      D England．

4.____ has never got both singles and doubles world champions in a year．

         A．Serena Williams                B．Lindsay Davenport

         C．Venus Williams           D．Martina Hingis

Parents are often amazed at how fast their child grows and develops. New research has determined that the ability to quantify may develop much sooner than most parents realize.

Kristy vanMarle, professor of the University of Missouri, has determined that contrary to what previous studies have shown, infants（婴儿）are able to quantify substances（物质）—like sand or water—as early as 10 months. As long as the difference between the two substances is large enough, infants will choose the larger amount, especially when it comes to food.

With the assistance of her team researchers, vanMarle tested the quantifying skills of babies by presenting them with two cups: one containing a small amount of food, and one containing a larger amount. Consistently, the babies chose the larger amount.

“Several studies throughout the last 15 years have shown that infants are very good at telling how many objects they see; however, infants don’t seem to count things like water or sand,” vanMarle said. “What we’re saying is that they can quantify substances; it’s just much harder. The infants can see how much food goes into each cup and compare that in their memories. They decide which amount is larger, and they almost always select the larger one.”

This information further refutes（驳斥）the long-held idea that babies “know nothing of the world,” vanMarle said.

“Since psychologists have begun studying infants with sensitive measures, we’ve discovered a lot of early abilities. I think for parents, it should be exciting to know that there’s somebody in there that has some fundamental and basic knowledge of the world, and that knowledge is guiding their development,” vanMarle said.

In the future, vanMarle says this kind of study could be linked to a child’s progress in math-related skills, although programs marketed to increase those abilities, such as “Baby Einstein,” still have mixed reviews when it comes to academic study.

1.The quantifying ability refers to the ability to     .

A. choose between different substances

B. get much knowledge of the world

C. describe the quantity of something

D. obtain math-related skills

2. What is mainly talked about in Paragraph 4?

A. The process of doing research.

B. The scientific findings.

C. The final choice of infants.]

D. The observation of infants’ behavior.

3.Babies choose the larger amount of food     .

A. by saying numbers                B. with the help of parents

C. on personal preference           D. through their natural abilities

4.We can learn from the text that     .

A. some parents don’t care about their kids

B. people used to think the world is known to babies

C. little research has been done on infants

D. scholars disagree on baby-training programs

5. What’s the best title of the text?

A. Breakthrough in Baby Studies

B. Amazing Baby-training Ideas

C. Early Human Abilities

D. Unique Quantifying Methods

Parents are often amazed at how fast their child grows and develops. New research has determined that the ability to quantify may develop much sooner than most parents realize.

Kristy vanMarle, professor of the University of Missouri, has determined that contrary to what previous studies have shown, infants（婴儿）are able to quantify substances（物质）—like sand or water—as early as 10 months. As long as the difference between the two substances is large enough, infants will choose the larger amount, especially when it comes to food.

With the assistance of her team researchers, vanMarle tested the quantifying skills of babies by presenting them with two cups: one containing a small amount of food, and one containing a larger amount. Consistently, the babies chose the larger amount.

“Several studies throughout the last 15 years have shown that infants are very good at telling how many objects they see; however, infants don’t seem to count things like water or sand,” vanMarle said. “What we’re saying is that they can quantify substances; it’s just much harder. The infants can see how much food goes into each cup and compare that in their memories. They decide which amount is larger, and they almost always select the larger one.”

“This information further refutes（驳斥）the long-held idea that babies “know nothing of the world,” vanMarle said.

“Since psychologists have begun studying infants with sensitive measures, we’ve discovered a lot of early abilities. I think for parents, it should be exciting to know that there’s somebody in there that has some fundamental and basic knowledge of the world, and that knowledge is guiding their development,” vanMarle said.

In the future, vanMarle says this kind of study could be linked to a child’s progress in math-related skills, although programs marketed to increase those abilities, such as “Baby Einstein,” still have mixed reviews when it comes to academic study.

1.The quantifying ability refers to the ability to     .

A. get much knowledge of the world

B. identify the quantity of something

C. choose between different substances

D. obtain math-related skills

2.Babies choose the larger amount of food     .

A.  on personal preference                  B. by saying numbers 

C.  with the help of parents                D. through their natural abilities

3.We can learn from the text that     .

A. people used to think the world is known to babies

B. scholars disagree on baby-training programs

C. little research has been done on infants

D. some parents don’t care about their kids