单选题I wonder what your aim in life is.

单选题This reminds me of lots of things.A. muchB. someC. bigD. many

单选题London's First Light Rail System The Docklands Light Railway (DLR) took just three years to build at a cost of ￡77 million. It is London's first Light Rail System, but its route follows that of a number of older lines, which carried the nineteenth century railways through the crowded districts of the East End. The section of the line from the Tower Gateway Station to Poplar follows the line of one of London's earliest railways, the London on board each vehicle, Train Captains, who are also fully qualified drivers, are equipped with two-way radios to maintain contact with central control. There are passenger lifts, and self-service ticket machines, at every station.

单选题They strolled around the lake for an hour or so. A. ran B. rolled C. walked D. raced

单选题The maximum speed of this car is 150 miles per hour.A. highestB. lowestC. minimumD. supreme

单选题A Phone That Knows You"re Busy It"s a modern problem: you"re too busy to be disturbed by incessant (连续不断的) phone calls so you turn your cellphone off. But if you don"t remember to turn it back on when you"re less busy, you could miss some important calls. If only the phone knew when it was wise to interrupt you, you wouldn"t have to turn it off at all. Instead, it could let calls through when you are not too busy. A bunch of behavior sensors (传感器) and a clever piece of software could do just that, by analyzing your behavior to determine if it"s a good time to interrupt you. If built into a phone, the system may decide you"re too busy and ask the caller to leave a message or ring back later. James Fogarty and Scott Hudson at Camegie Mellon University in Pennsylvania based their system on tiny microphones, cameras and touch sensors that reveal body language and activity. First they had to study different behaviors to find out which ones strongly predict whether your mind is interrupted. The potential "busyness" signals they focused on included whether the office doors were left open or closed, the time of day, if other people were with the person in question, how close they were to each other, and whether or not the computer was in use. The sensors monitored these and many other factors while four subjects were at work. At random intervals, the subjects rated how interruptible they were on a scale ranging from "highly interruptible" to "highly not-interruptible". Their ratings were then correlated with the various behaviors. "It is a shotgun (随意的) approach: we used all the indicators we could think of and then let statistics find out which were important," says Hudson. The model showed that using the keyboard, and talking on a landline or to someone else in the office correlated most strongly with how interruptible the subjects judged themselves to be. Interestingly, the computer was actually better than people at predicting when someone was too busy to be interrupted. The computer got it right 82 per cent of the time, humans 77 per cent. Fogarty speculates that this might be because people doing the interrupting are inevitably biased towards delivering their message, whereas computers don"t care. The first application for Hudson and Fogarty"s system is likely to be in an instant messaging system, followed by office phones and cellphones. "There is no technological roadblock (障碍) to it being deployed in a couple of years," says Hudson.

单选题I was surprised to find that they all fell in with my suggestion at once.

单选题The trains on the DLR are controlled by

单选题Beef is an excellent material of iron.

单选题Gambling is lawful in this state. A．legal B．irresistible C．enjoyable D．profitable

单选题Tonight"s live coverage of the hockey game is very wonderful.

单选题The park gave the whale to the Foundation and big Ucontributions/U came from all parts of the world.

单选题A New Way to Help Predict Earthquakes Scientists in the United States have developed a method that may help to predict earthquakes earlier. They say it could give people who live in deadly earthquake areas enough warning to leave before an earthquake hits. Currently, the most modem systems for predicting earthquakes find them only a short time before the event. Like most strong earthquakes, the one that hit southwestern China in May wasnot identified early enough for people to flee the area. That earthquake killed sixty-nine thousand people. But scientists who study earthquakes are reporting that new technology could measure very small changes in the Earth's surface. Their report was published this month in Nature magazine. Fenglin Niu is a seismologist with Rice University in Houston, Texas. He and his team performed experiments along California's San Andreas Fault, an area famous for its many earthquakes. The team placed highly sensitive electrical devices about one kilometer below ground in two different places. The devices were able to measure even small changes in air pressure on the Earth's surface. The scientists say such changes are caused when rocks push together, forcing air out of small cracks in the rock. When this happens, seismic waves travel taster than usual through the rock. The experiment was performed near Parkfield, California. Two earthquakes hit the area in late two thousand five. The first took place on December twenty-fifth. A smaller earthquake struck five days later. The scientists noted changes in the Earth's surface about ten hours before the first quake struck. That quake measured three in intensity. They then found similar changes taking place two hours before the other quake struck five days later. The earthquake in China rated seven point nine in intensity. If additional tests confirm the changes are linked to earthquakes, the scientists believe their equipment could be used for early warning systems. A system that provides a signal ten hours before a major earthquake could help move people from the area and save lives. The scientists now hope they can find earthquakes with even greater intensity by placing their equipment deeper in the ground.

单选题What We Take from And Give to the Sea As long as we have been on earth, we have used the sea around US. We take from the ocean, and we give to it. We take fishes from the ocean—millions of kilograms of fish, every year, to feed millions of people. We even use their bones for fertilizer. We take minerals from the ocean. One way to get salt is to place seawater in a shallow basin and leave it until it evaporates. Along with salt, other minerals are left after evaporation. Much gold and silver drift dissolved in the waters of the sea, too. But the sea does not give them up by simple evaporation. Other gifts from the sea are pearls, sponges and seaweed. Pearls become jewelry. Natural sponges become cleaning aids. Seaweed becomes food of many kinds—even candy, and ice cream—as well as medicine. Believe it or not, flesh water is another gift from the sea. We cannot drink ocean waten Some of its contents may cause illness. But ocean water becomes flesh water when the salts are removed. In the future. We will find ourselves depending more and more on flesh water from the sea. The sea gives US food, fertilizer, minerals, water, and other gifts. What do we give the sea? Garbage. We pollute the ocean when we use it as a garbage dump. Huge as it is, the ocean cannot hold all the water that we pour into it. Dumping garbage into the ocean is killing off sea life. Yet as the world population grows, we may need the sea and its gifts more than ever. We' re finally learning that if we destroy our seas, we might also destroy ourselves. Hopefully, it is not too late.

单选题The company recommended that a new petrol station should be built here. A. ordered B. insisted C. suggested D. demanded

单选题Solar Storm At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations. This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space. The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth's magnetic field. A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground. The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It's really damaging. Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can't drop their guard.

单选题下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。请根据文章的内容，从每题所给的4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} {{B}} More Than a Ride to School{{/B}} The National Education Association claims, "The school bus is a mirror of the community." They further add that, unfortunately, what appears on the exterior does not always reflect the reality of a chosen community. They are right - sometimes it reflects more! Just ask Liesl Denson. Riding the school bus has been more than a ride to school for Liesl. Bruce Hardy, school bus driver for Althouse Bus Company has been Liesl's bus driver since kindergarten. Last year when Liesl's family moved to Parkesburg, knowing her bus went by her new residence, she requested to ride the same bus. This year Liesl is a senior and will enjoy her last year riding the bus. She says, "It's been a great ride so far! My bus driver is so cool and has always been a good friend and a good listener. Sometimes when you're a child adults do not think that what you have to say is important. Mr. Hardy always listens to what you have to say and makes you feel important." Her friends Ashley Batista and Amanda Wolfe agree. Bruce Hardy has been making Octorara students feel special since 1975. This year he will celebrate 30 years working for Althouse Bus Company. Larry Althouse, president of the company, acknowledges Bruce Hardy's outstanding record: "You do not come by employees like Bruce these days. He has never missed a day of work and has a perfect driving record. He was recognized in 2000 by the Pennsylvania School Bus Association for driving 350,000 accident free miles. Hardy's reputation is made further evident through the relationships he has made with the students that ride his bus." Althouse further adds, "Althouse Bus Company was established 70 years ago and has been providing quality transportation ever since. My grandfather started the business with one bus. Althouse Bus Company is delighted to have the opportunity to bring distinctive and safe service to our local school and community and looks forward to continuing to provide quality service for many more years to come." Three generations of business is not all the company has enjoyed. Thanks to drivers like Bruce Hardy, they have been building relationships through generations. Liesl's mother Carol also enjoys fond memories of riding Bruce Hardy's bus to the Octorara School District.

单选题The Threat to Kiribati The people of Kiribati are afraid that one day in the not-too-distant future, their country will disappear from the face of the earth-literally. Several times this year, the Pacific island nation has been flooded by a sudden high tide. These tides, which swept across the island and destroyed houses, came when there was neither wind nor rain. "This never happened before, "say the older citizens of Kiribati. What is causing these mysterious high tides? The answer may well be global warming. When fuels like oil and coal are being burned, pollutants (污染物)are released; these pollutants trap heat in the earth"s atmosphere. Warmer temperatures cause water to expand and also create more water by melting glaciers (冰川)and polar (极地的) ice caps. If the trend continues, scientists say, many countries will suffer. Bangladesh, for example, might lose one-fifth of its land. The coral (珊瑚) island nations of the Pacific, like Kiribati and the Marshall Islands, however, would face an even worse fate—they would be swallowed by the sea. The loss of these coral islands would be everyone"s loss. Coral formations are home to more species than any other place on earth. The people of these nations feel frustrated. The sea, on which their economies have always been based, is suddenly threatening their existence. They don"t have the money for expensive technological solutions like seawalls. And they have no control over the pollutants, which are being released mainly by activities in large industrialized countries. All they can do is to hope that industrialized countries will take steps to reduce pollution.

单选题下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 Inventor of LED When Nick Holonyak set out to create a new kind of visible lighting using semiconductor alloys, his colleagues thought he was unrealistic. Today, his discovery of light-emitting diodes, or LEDs, are used in everything from DVDs to alarm clocks to airports. Dozens of his students have continued his work, developing lighting used in traffic lights and other everyday technology. On April 23, 2004, Holonyak received the $ 500,000 Lemelson-MIT Prize at a ceremony in Washington. This marks the 10th year that the Lemelson-MIT Program at the Massachusetts Institute of Technology (MIT) has given the award to prominent inventors. "Anytime you get an award, big or little, it's always a surprise. " Holonyak said. Holonyak, 75, was a student of John Bardeen, an inventor of the transistor, in the early 1950s. After graduate school, Holonyak worked at Bell Labs. He later went to General Electric, where he invented a switch now widely used in house dimmer switches. Later, Holonyak started looking into how semiconductors could be used to generate light. But while his colleagues were looking at how to generate invisible light, he wanted to generate visible light. The LEDs he invented in 1962 now last about 10 times longer than incandescent bulbs, and are more environmentally friendly and cost effective. Holonyak, now a professor of electrical and computer engineering and physics at the University of Illinois, said he suspected that LEDs would become as commonplace as they are today, but didn't realize how many uses they would have. "You don't know in the beginning. You think you're doing something important, you think it's worth doing, but you really can't tell what the big payoff is going to be, and when, and how. You just don't know. " he said. The Lemelson-MIT Program also recognized Edith Flanigen, 75, with the $100,000 Lemelson-MIT Lifetime Achievement Award for her work on a new generation of "molecular sieves," that can separate molecules by size.

单选题The word“smog”first appeared in 1952．