单选题They'd paid a substantial bribe to the surgeon in Rio. A. meager B. stern C. subtle D. steep

单选题 下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 No Jetlag(时差反应) Anymore Most people who travel long distances complain of jetlag(时差反应). Jetlag makes business travelers less productive (对产的，有成效的) and more prone {{U}}(51) {{/U}} making mistakes. It is actually caused by {{U}}(52) {{/U}} of your "body clock"-a small cluster(串、组、群)of brain cells that controls the timing of biological {{U}}(53) {{/U}}. The body clock is designed for a regular rhythm(节奏)of daylight and darkness, so that it is thrown out of balance when it experiences daylight and darkness at the "wrong" times in a new time zone. The {{U}}(54) {{/U}} of jetlag often persist(持续) for days {{U}}(55) {{/U}} the internal body clock slowly adjusts to the new time zone. Now a new anti-jetlag system is available that is based on proven, {{U}}(56) {{/U}} and pioneering scientific research. Dr. Martin Moore has devised a practical strategy to adjust the body clock much sooner to the new time zone {{U}}(57) {{/U}} controlled exposure to bright light. The time zone shift(转换) is easy to accomplish and eliminates (消除) {{U}}(58) {{/U}} of the discomfort of jetlag. A successful time zone shift depends on knowing the exact times to either {{U}}(59) {{/U}} or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule {{U}}(60) {{/U}} light exposure depends a great deal on {{U}}(61) {{/U}} travel plans. Data on a specific flight itinerary (旅行路线) and the individual's sleep {{U}}(62) {{/U}} are used to produce a trip guide with {{U}}(63) {{/U}} on exactly when to be exposed to bright light. When the trip guide calls {{U}}(64) {{/U}} bright light you should spend time outdoors if possible. If it is dark outside, or the weather is bad, {{U}}(65) {{/U}} you are on an air plane, you can use a special light device to provide the necessary light stimulus(刺激) for a range of activities such as reading, watching TV or working.

单选题The carts are painted to correspond to the themed area they are used in. A. march with B. combine with C. standardize D. coordinate with

单选题Earthquake How does an earthquake start? What makes an earthquake happen? The rock of the earth"s crust (地壳) may have a fault, a kind of break in the surface. The blocks which make up the earth move, and sometimes this may cause the sides of the fault to move up and down or lengthways (纵向地) against each other. When one piece of rock starts to rub on another with great force, a lot of energy is used. This energy is changed into vibrations (振动) and it is these vibrations that we reef as an earthquake. The vibrations can travel thousands of kilometers and so an earthquake in Turkey may be felt in Greece. What to do during an earthquake? At school As soon as the earthquake starts, students should get under the desks immediately and wait until the teacher tells them it is safe to come out. The teacher should, at the same time, go immediately to the teacher"s desk, get underneath (在……下面) it and stay there till the danger is over. Students must not argue with the teacher or question instructions. As soon as the tremors (震动) stop, all students should walk towards the exit and go straight to the school playground or any open space such as a square or a park. They must wait there until the teacher tells them it is safe to go. At home If you are at home when the earthquake occurs, get immediately under the table in the living room or kitchen. Choose the biggest and strongest table you can find. You must not go anywhere near the window and don"t go out onto the balcony (阳台). Once the tremors have stopped, you can come out from under the table but you must leave the building straight away. You should walk down the stairs and should not use the lift-there may be a power cut as a result of the earthquake and you could find yourself trapped inside the lift for hours. In the street If you are in the street when the earthquake takes place, do not stand near buildings, fences or walls--move away as quickly as possible and try to find a large open space to wait in. Standing under trees could also be dangerous.

单选题The child's abnormal behavior puzzled the doctor. A. bad B. frightening C. repeated D. unusual

单选题Putting Plants to Work Using the power of the sun is nothing new. People have had solar-powered calculators and buildings with solar panels for decades. But plants are the real experts: They've been using sunlight as an energy source for billions of years. Ceils in the green leaves of plants work like tiny factories to convert sunlight, carbon dioxide, and water into sugars and starches, stored energy that the plants can use. This conversion process is called photosynthesis. Unfortunately, unless you're a plant, it's difficult and expensive to convert sunlight into storable energy. That's why scientists are taking a closer look at exactly how plants do it. Some scientists are trying to get plants, or biological cells that act like plants, to work as miniature photosynthetic power stations. For example, Mafia Ghirardi of the National Renewable Energy Laboratory in Golden, Colo., is working with green algae. She's trying to trick them into producing hydrogen instead of sugars when they perform photosynthesis. Once the researchers can get the algae working efficiently, the hydrogen that they produce could be used to power fuel cells in cars or to generate electricity. The algae are grown in narrow-necked glass bottles to produce hydrogen in the lab during photosynthesis, plants normally make sugars or starches. "But under certain conditions, a lot of algae are able to use the sunlight energy not to store starch, but to make hydrogen." Ghirardi says. For example, algae will produce hydrogen in an air free environment. It's the oxygen in the air that prevents algae from making hydrogen most of the time. Working in an air free environment, however, is difficult. It's not a practical way to produce cheap energy. But Ghirardi and her colleagues have discovered that by removing a chemical called sulfate from the environment that the algae grow in, they will make hydrogen instead of sugars, even when air is present. Unfortunately, removing the sulfate also makes the algae's cells work very slowly, and not much hydrogen is produced. Still, the researchers see this as a first step in their goal to produce hydrogen efficiently from algae. With more work, they may be able to speed the cells' activity and produce larger quantities of hydrogen. The researchers hope that algae will one day be an easy-to-use fuel source. The organisms are cheap to get and to feed, Ghirardi says, and they can grow almost anywhere: "You can grow them in a reactor, in a pond You can grow them in the ocean. There's a lot of flexibility in how you can use these organisms. /

单选题It took me exactly a week to complete the work.A. doB. achieveC. improveD. finish

单选题These factors interact intimately and cannot be separated.

单选题The Need to Remember Some people say they have no memory at all: "I just can"t remember a thing!" But of course we all have a memory. Our memory tells us who we are. Our memory helps us to make use in the present of what we have learnt in the past. In fact we have different types of memory. For example, our visual memory helps us recall facts and places. Some people have such a strong visual memory, they can remember exactly what they have seen, for example, pages of a book, as a complete picture. Our verbal (言语的) memory helps us remember words and figures we may have heard but not seen or written: items of a shopping list, a chemical formula, dates, or a recipe. With our emotional (情感的) memory, we recall situations or places where we had strong feelings, perhaps of happiness or unhappiness. We also have special memories for smell, taste, touch and sound, and for performing physical movements. We have two ways of storing any of these memories: Our short-term memory stores items for up to thirty seconds—enough to remember a telephone number while we dial. Our long-term memory, on the other hand, may store items for a lifetime. Older people in fact have a much better long-term memory than short-term. They may forget what they have done only a few hours ago, but have the clearest remembrance (记忆) of when they were very young. Psychologists tell us that we only remember few facts about our past, and that we invent the rest. It is as though we remember only the outline of a story. We then make up the details. We often do this in the way we want to remember them, usually so that we appear as the heroes of our own past or maybe victims needing sympathy (同情).

单选题God is believed to be omnipotent.A. everlastingB. extraordinaryC. all-powerfulD. important

单选题The phrase "coming back out of the cave" in the fifth paragraph means

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。 {{B}} Earthquake{{/B}}{{B}}How does an earthquake start?{{/B}}What makes an earthquake happen? The rock of the earth's crust (地壳) may have a 'fault', a kind of break in the surface. The blocks which make up the earth move, and sometimes this may cause the sides of the fault to move up and down or lengthways (纵向地) against each other. When one piece of rock starts to rub on another with great force, a lot of energy is used. This energy is changed into vibrations (振动) and it is these vibrations that we feel as an earthquake. The vibrations can travel thousands of kilometers and so an earthquake in Turkey may be felt in Greece.{{B}}What to do during an earthquake?{{/B}}{{B}}At school{{/B}}As soon as the earthquake starts, students should get under the desks immediately and wait until the teacher tells them it is safe to come out. The teacher should, at the same time, go immediately to the teacher's desk, get underneath (在 ...... 下面) it and stay there till the danger is over. Students must not argue with the teacher or question instructions. As soon as the tremors (震动) stop, all students should walk towards the exit and go straight to the school playground or any open space such as a square or a park. They must wait there until the teacher tells them it is safe to go.{{B}}At home{{/B}}If you are at home when the earthquake occurs, get immediately under the table in the living room or kitchen. Choose the biggest and strongest table you can find. You must not go anywhere near the window and don't go out onto the balcony (阳台). Once the tremors have stopped, you can come out from under the table but you must leave the building straight away. You should walk down the stairs and should not use the lift - there may be a power cut as a result of the earthquake and you could find yourself trapped inside the lift for hours.{{B}}In the street{{/B}}If you are in the street when the earthquake takes place, do not stand near buildings, fences or walls -move away as quickly as possible and try to find a large open space to wait in. Standing under trees could also be dangerous.

单选题Not all the solar energy released by the sun reaches the earth's surface. About 34% is scattered into space by the gases or dust in the atmosphere. Another 19% is absorbed by the different layers of the atmosphere. The remaining 47% finally reaches the ground where it is absorbed as heat. How much of the solar energy is absorbed as heat?A. 19%B. 34%C. 53%D. 47%.

单选题Regular visits from a social worker can be of immense value to old people living alone.

单选题Poor people queued up to wait for free food.A. linedB. stoodC. gotD. registered

单选题The food is insufficient for three people.

单选题They talked for about an hour of things and persons ______ they remembered in the school.A. whichB. thatC. whoD. whom

单选题The troposphere is the warmest part of the atmosphere because it _______.

单选题She was close to success. A．fast B．quick C．near D．tight

单选题Technological Utopia for Developing Countries Cyberspace (网络空间), data superhighways, multimedia for those who have seen the future, the linking of computers, television and telephones will change our lives forever. Yet for all the talk of a forthcoming technological Utopia (乌托邦), little attention has been given to the implications of these developments for the poor. As with all new high technology, while the West concerns itself with the "how", the question of "for whom" is put aside once again. Economists are only now realizing the full extent to which the communications revolution has affected the world economy. Information technology allows the extension of trade across geographical and industrial boundaries, and transnational corporations take full advantage of it. Terms of trade exchange, interest rates and money movements are more important than the production of goods. The electronic economy made possible by information technology allows the haves to increase their control on global markets with destructive impact on the have-nots. For them the result is instability. Developing countries which rely on the production of a small range of goods for export are made to feel like small parts in the international economic machine. As "futures" (期货) are traded on computer screens, developing countries simply have less and less control of their destinies. So what are the options for regaining control? One alternative is for developing countries to buy in the latest computers and telecommunications themselves—so-called "development communications" modernization. Yet this leads to long-term dependency and perhaps permanent constraints on developing countries" economies. Communications technology is generally exported from the U.S., Europe or Japan; the patents, skills and ability to manufacture remain in the hands of a few industrialized countries. It is also expensive, and imported products and services must therefore be bought on credit—credit usually provided by the very countries whose companies stand to gain. Furthermore, when new technology is introduced there is often too low a level of expertise to exploit it for native development. This means that while local elites, foreign communities and subsidiaries of transnational corporations may benefit, but not developing countries.