A powerful earthquake struck the northeastern coast of Japan at two forty-six p.m. local time on March eleventh.2011. Japan's Meteorological Agency released its first tsunami（海啸） warnings just three minutes later. The country has one of the best earthquake early warning systems in the world.

There are more than four thousand Seismic Intensity Meters in place throughout Japan to measure earthquake activity. These meters provide information within two minutes of an earthquake happening. Information about the strength and the center of the earthquake can be learned within three minutes.

There are also concrete(混凝土) sea walls around much of the Japanese coastline. But these measures proved no match for the powerful earthquake and tsunami.

Costas Synolakis ，a tsunami expert at the University of Southern California in Los Angeles said，"Japan is one of those most well-prepared countries on earth in terms of tsunami warning. They had a warning. I think what went wrong is that they had not expected the size of this event."

He says there are two reasons for this. Japan has not had any event anywhere near as big as this one in the last one hundred fifty years. And scientists had not expected such a large earthquake happening off the coast of Japan.

The nine point zero magnitude earthquake was the fourth most powerful earthquake ever recorded worldwide. It was also the worst earthquake ever to hit Japan. The tsunami waves that followed were reported to have reached as high as thirteen meters in some areas.

Costas Synolakis says Japan's concrete sea walls were not built to handle such high waves.

Experts say early warning systems will continue to be limited by these facts until earthquakes and tsunamis can be predicted

Where can this passage probably be adapted from?

    A．A magazine on science       B．A fairy Tale 

C．A scientific fantasy book     D．A newspaper  

Which of the following statements NOT true ?

    A. A terrible earthquake hit the northeastern coast of Japan

    B. It was also the worst earthquake in Japan

C. The 9.0 earthquake was the fourth most powerful earthquake ever recorded in Japan

D. Japan's concrete sea walls was unable to handle such high waves.

According to Costas Synolakis, why did Japan suffer such a loss?

  A. The country has never experienced any event as big as this one over the past 150 years

B. Japan has the best earthquake early warning systems in the world.

C. There are not concrete sea walls around all of the Japanese coastline

D. The government didn’t announce its first tsunami warnings three minutes earlier.

A cheap drug that can stop bleeding in people recently injured in an accident could potentially save the lives of tens of thousands worldwide, a new study says.

  Researchers studied the effects of tranexamic acid （凝血酸）, or TXA, in more than 10,000 injured people in 40 countries who received the drug within 8 hours of being injured. The study was published in the medical journal Lancet. Doctors found that patients who got TXA had a 15percent lower chance of dying from hemorrhage than those who didn’t get it . They also had a 10 percent lower chance of dying from any other cause, including organ failure and a head injury. The study was paid for by the British government.

  The drug is commonly used in wealthy countries during elective surgeries(外科手术) to stop bleeding , but isn’t used for accident victims. TXA is off-patent and made by many companies. It costs about $4.5 per gram, and a typical dose is two grams. It is usually given via an injection（注射） and would be relatively easy to introduce, even in poor countries, experts said.

  Previous tests of the drug regarded its use in elective surgeries, such as heart operations, but this was the first study to test the drug on accident victims. Doctors were worried it might increase side effects such as blood clots （凝块）in the heart and lungs, strokes, or heart attacks. There was no evidence of that in the Lancet study, though the authors said it was possible they might have missed some of these incidents.

  For people between 5 and 45, accidents are the second leading cause of death worldwide after AIDS, and about 600,000 injured patients bleed to death every year. Experts estimated that if TXA were readily available, between 70,000 and 100,000 lives a year could be saved. Though the drug wasn’t tested on children , experts said it would almost certainly work with them as well.

The underlined word” hemorrhage” in Paragraph 2 probably means ________

 A. serious illness    B. heart disease     C. heavy bleeding   D. lack of drug

What can we learn about TXA from the passage?

 A. It can only be made in England     B. It was only used in operations before

 C. It is a patented drug              D. It is mainly used in poor countries

Doctors were worried about using TXA because ________

 A. a lot of patients died unexpectedly after using it

 B. it has no treatment effect on patients

 C. it can cause blood clots or stroke

 D. they hadn’t used it on accident victims before

What do we know from the last paragraph?

 A. It is a pity that TXA wasn’t widely used on injured patients before

 B. Tests have proved that TXA can be used on children

 C. People between 5 and 45 should be injected with TXA every year

 D. Accidents are the first leading cause of death worldwide.

A painter hangs his or her finished pictures on a wall, and everyone can see it. A composer writes a work, but no one can hear it until it is performed. Professional singers and players have great responsibilities, for the composer is utterly dependent on them.

 A student of music needs as long and arduous a training to become a performer as a medical student needs to become a doctor. Most training is concerned with technique, for musicians have to have the muscular proficiency of an athlete or a ballet dancer. Singers practice breathing every day, as their vocal chords would be inadequate without controlled muscular support. String players practice moving the fingers of the left hand up and down, while drawing the bow to and fro with the right arm----????????two entirely different movements. Singers and instruments have to be able to get every note perfectly in tune. Pianists are spared this particular anxiety, for the notes are already there, waiting for them, and it is the piano tuner's responsibility to tune the instrument for them. But they have their own difficulties; the hammers that hit the string have to be coaxed not to sound like percussion, and each overlapping tone has to sound clear. This problem of getting clear texture is one that confronts（使面对）student conductors: they have to learn to know every note of the music and how it should sound, and they have to aim at controlling these sounds with fanatical but selfless authority. Technique is of no use unless it is combined with musical knowledge and understanding. Great artists are those who are so thoroughly at home in the language of music that they can enjoy performing works written in any century.

19. In writing this passage, the purpose of the author is ___________.

   A. to tell us we use different sense at paints and music

   B. to recommend music needs more technique

   C. to inform us that to become a musician needs long and arduous training

   D. for the students who are to go in for music

20. If you are a string performer, you have to _____________.

   A. use your left hand to draw the bow and the right to move up and down

   B. have your both hands perform the same movements.

   C. own technique, musical knowledge and understanding

   D. practice more and more without any training

21. The problem of getting clear texture is that ____________.

  A. confronts student conductors

  B. the student conductors have to know every note and how it should sound and how to control the sounds fanatically.

 C. the sounds are too easy to control

 D. the composer’s work cannot be seen on the wall.

22. According to the passage, _______________.

 A. a composer cannot perform the music at all.

 B a composer has to utterly depend on student conductors

 C. student conductors need more training and knowledge on music to be great artists.

 D. Great artists are thoroughly at home in the language of music.

This is a dangerous world we live in．The number of murders goes up every year, people are dying of cancer, more people contract HIV, more teens are using drugs, etc．You know this because you have heard all the statistics on the news and in the paper． But do you really have an accurate idea what they mean? The numbers are growing up, but how do they compare to the growth in population? Are more cases of these diseases being reported because of better testing techniques, or are the diseases more common? The fact is that without knowing the background statistics mean very little．

   This growing trend of reporting only part of the information is becoming dangerous．For example, several years ago a high school student reported the dangers of the chemical known as dihydrogen monoxide．This chemical, found in most cancerous tumors（肿瘤）, is often found in the blood of people drunk on alcohol, and causes complete physical and mental dependence for those who take the chemical even once．After reading his report, more than 75% of his Advanced Placement Chemistry class voted to forbid this dangerous chemical! Every one of the above statements is true, yet this chemical is necessary to all life on earth．The students made the mistake because they voted knowing only a few statements and statistics, rather than the chemical’s full background．

   The point of this article is that one should be aware of what is and is not being said．When one finds a new fact or number, one should try to consider other important information before forming an opinion with only half-truths．Always remember that the author is trying to convince you of his or her own view, and will leave out information that is different to his view．For example, look again at the statistics that suggest skiing is safe．Only 32 people may die each year when skiing, while 897 die from lightning strikes, but which is really the most dangerous? If you think about it, you realize far fewer people go skiing each year than the number of people who are in danger of a lightning strike．When you think about it, skiing is more dangerous than you might at first think when looking at statistics．If we teenagers are to be left in this world, we had better be able to think critically, and form our own views, rather than be easily persuaded by another’s．To be warned is to be prepared．

In the first paragraph, what problem does the writer want to warn us?

       A．We are now living in a dangerous world．

       B．We get a lot of false statistics from the media．

       C．Statistics alone without full background doesn’t give us an accurate pictures of things．

       D．There are around us more and more murders, diseases, etc．

Why does the writer use the example in the second paragraph?

       A．To argue that high school students are easily persuaded．

       B．To show the danger of reporting only part of the information．

       C．To prove what is necessary to us might be dangerous．

       D．To warn us of the harmful substance around us．

Relative information is often left out because__________．

       A．Relative information is not that important．

       B．too much information will make readers feel confused．

       C．the author is trying to show what he or she says is true．

       D．readers are not able to analyze so much information at once．

What can we learn from the passage?

       A．We should learn to think critically and look at problems from all sides．

       B．Some measures must be taken to protect our dangerous world．

       C．The growing trend of reporting only half-truths is getting out of control．

D．Teenagers ought to improve their ability of telling right from wrong．

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 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.”

72. 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 no assemble the components

73. 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

74. 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.

75. 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