单选题Cars have traditionally been wasteful beasts. Every time a drop of gas explodes inside a cylinder(气缸), the energy gets passed along from the piston(活塞) to the crankshaft(曲轴), flywheel(飞轮), gearbox, drivetrain, and axles(轮轴). By the time the wheels actually turn, four fifths of the original energy has disappeared. The electric car goes a long way toward reducing wasted energy by replacing the internal-combustion engine with batteries. Even so, electric cars destroy about 60 percent of the energy because mechanical parts are still used to deliver energy from the bakeries to the wheels. Lately, though, engineers have come up with a far more efficient way to accomplish the same task: by using magnets in the wheels. Why do electric cars still waste much of the energy?A. Because they have replaced the internal-combustion engine with bakeries.B. Because they still use mechanical paas to transfer energy to the wheels.C. Because they use magnets in the wheels which add weight to the car.D. Because batteries are not powerful enough to drive the cars.

单选题She stood there, crying and trembling with fear.

单选题Customers often {{U}}defer{{/U}} payment for as long as possible

单选题Mary is looking for the book she lost yesterday. A．trying to find B．looking up C．looking at D．finding

单选题There was a {{U}}profound{{/U}} silence after his remark. A. proud B. short C. sudden D. deep

单选题Almost everyone at the meeting has different views.

单选题It is obvious that it has been too late to take action.

单选题This kind of animals is on the verge of extinction .

单选题She stood there, trembling with fear.

单选题Can you follow the plot so far? A．change B．investigate C．write D．understand

单选题Eye Movement and Several Faults in Reading Suppose you do this experiment with a friend. Get hold of a book with a large page size and lines that run right across the page. Get your friend to hold the book up and to read it with the top of the book just below his eye level. This means that you can watch the movement of his eyes as he reads the page. If you do this, you will see that your friend's eyes do not make a continuous forward sweep. Instead, they progress by little "jumps" moving, then stopping, as they progress along the line. This kind of jumping movement is called a saccadic movement(跳跃). There has to he this starting and stopping movement because the eye can see only when it is still motionless. Every time the eye pauses it sees a phrase or even a sentence then jumps to the next part of the line and so on. There is another interesting fact about eye movement. If you record the eye movements of someone who is reading, you will notice that, from time to time, the reader goes back and looks again at something he has read before; in other words, he regresses(回视) an earlier part of the text, probably because he realizes he does not understand the passage properly. Then he comes back to where he left off and continues reading. At one time, it was though that regression was a fault, but it is in fact a very necessary activity in efficient reading. There are several different kinds of faults in reading, which are usually more exaggerated with foreign language learners. The most common one is that most people read everything at the same slow speed, and do not seem to realize that they can read faster or slower as required. Other people say the words to themselves, or move their lips-these habits slow the reader down to something near speaking speed, which is of course much slower than reading speed. Another habit that can slow you down is following the line with your finger, or with a pen.

单选题Many scientists have been probing psychological problems.

单选题The council meeting terminated at 2 o"clock.

单选题The explorer lost his way so he climbed to the top of the hill to determine the place for himself. A. spot B. locate C. place D. situate

单选题They have the {{U}}capability{{/U}} to destroy the enemy in a few days. A.possibility B.necessity C.ability D.probability

单选题They didn’t (realize) how serious the problem was．

单选题 Irradiating Food Irradiating fruits, vegetables, pork and chicken to kill insects and bacteria has been approved by the Food and Drug Administration over the past decade or so. Irradiation of other meats, such as beef and lamb, is being reviewed. Federal approval does not require that industry adopt the process, and few food processors presently offer irradiated products. Market studies have shown that many consumers are afraid that eating irradiated foods may cause cancer, despite scientific studies that prove the safety of treated foods. Some people argue that more severe government inspection, higher food-safety standards, and more careful preparation practices by consumers are all that is needed to ensure that food is safe. Consequently, companies currently see no need to spend millions of dollars outfitting processing plants with the equipment necessary for a process that very few shoppers are in favor of. All supermarkets that sell irradiated food must label the food either directly on the packaging, or, in the case of bulk items like fruits and vegetables, by placing a sign nearby. There is no requirement for the labeling of irradiated food served by chain restaurants or hospitals that buy directly from distributors, nor any regulations for products that contain irradiated ingredients. Presently, the FDA allows food to be treated with three types of radiation—gamma rays, high-energy electrons, and X rays—and sets limits on doses, depending on the type of food. The principle is that the dose to be used for a certain type of food should not exceed the amount that is sufficient to kill most harmful insects and bacteria present in it. Different types of food, because of their molecular compositions, may require different doses of radiation.

单选题Immigration and Problems Hundreds of thousands of people supporting immigration rights in the US filled streets all over America in early 2006. Many held signs and American flags and asked to be treated as citizens—not criminals. Many of these supported legislation from Senator John McCain that would open a path to citizenship to immigrants who were already in the country illegally. Proposed legislation from other politicians called for stricter measures - including rounding up undocumented immigrants and sending them back to their home countries. Canadian officials say that immigration applications continue to rise. Some want to keep the doors open. They need the labor. About 400,000 immigrants were allowed into the country in 2005, according to the Canadian Government statistics. However, all this growth means that cities need to adapt. Newcomers don"t always make a smooth transition into jobs for which they are skilled. So industries are using mentoring programs to help new immigrants find proper jobs. With the large numbers of undocumented African immigrants arriving in the Canary Islands and showing no sign of abating, the Spanish Government has decided to get tough. There will be no more mass amnesties for illegal, and anyone coming to Spain without permission will be sent back, the government has announced. About 23,000 migrants landed on the islands in 2006, and riots have erupted in some crowded reception centers. This has promoted local authorities to appeal to the United Nations for help. France"s new immigration and integration law gives the government new powers to encourage high-skilled migration. It takes effect in 2007. The new law authorizes the government to identify particular professions where France has a talent shortage. Then the government will help these identified employers find immigrant workers with needed skills or qualifications. The selected foreign employees will be granted "skills and talents" visas, valid for three years. But some concern that it"ll cause brain drain in developing countries.

单选题To flame up his boss, Dick had to make up evidence. A. collect B. disclose C. invent D. generate

单选题Mr. Johnson evidently regarded this as a great joke. A. readily B. casually C. obviously D. simply