单选题Will you please {{U}}call{{/U}} my husband as soon as possible? A. contact B. consult C. phone D. visit

单选题Forester stared at his car, trembling with rage.A. turningB. jumpingC. shoutingD. shaking

单选题She bumped into her boyfriend in town this morning.

单选题At the age of 30, Hersey suddenly became a celebrity .

单选题Scientists Develop Ways of Detecting Heart Attack German researchers have 1 a new generation of defibrillators and early warning software aimed at offering heart patients greater protection 2 sudden death from cardiac arrest. In Germany alone around 100,000 people die annually as a result of cardiac arrest and many of these cases 3 by disruption to the heart"s rhythm. Those most at risk are patients who have 4 suffered a heart attack, and for years the use of defibrillators has proved useful in diagnosing 5 disruptions to heart rhythms and correcting them automatically by intervening within seconds. These devices 6 a range of functions, such as that of pacemaker. Heart specialists at Freiburg"s University Clinic have now achieved a breakthrough with an implanted defibrillator 7 of generating a six channel electrocardiogram (ECG) within the body. This integrated system allows early diagnosis of 7 blood flow problems and a pending heart attack. It will be implanted in patients for the first time this year. Meanwhile, researchers at the Fraunhofer Institute for Applied Mathematics in Kaiserslautern have developed new computer software that renders of ECG data 8 . The overwhelming 9 of patients at risk will not have an implanted defibrillator and must for this reason undergo regular ECGs. "Many of the current programs only 10 into account a linear correlation of the data. We are, however, making use 11 a non-linear process that reveals the chaotic patterns of heart beats as an open and complex system," Hagen Knaf says. " 12 changes in the heart beats over time can be monitored and individual variations in patients taken into account." An old study of ECG data, based 13 600 patients who had suffered a subsequent heart attack, enabled the researchers to compare risks and to show 14 the new software evaluates the data considerably better.

单选题Don't injure yourself with that tool.A. blameB. hurtC. equipD. provide

单选题The towers of a suspension bridge serve as a rigid Uframework/U to which the cables are attached.

单选题Before the first Apollo rocket went to the Moon, a spot for landing the lunar module was carefully chosen.A. climateB. latitudeC. seaD. location

单选题The command BU (Control B, -then U) underlines text.A. typeB. passwordC. programD. instruction

单选题It is much easier to talk about social change than it is to {{U}}make it happen{{/U}}.

单选题New Moral Philosophies or Not In the next century we"ll be able to alter our DNA radically, encoding our visions and vanities while concocting new life-forms. When Dr. Frankenstein made his monster, he wrestled with the moral issue of whether he should allow it to reproduce, "Had I the right, for my own benefit, to inflict the curse upon everlasting generations?" Will such questions require us to develop new moral philosophies? Probably not. Instead, we"ll reach again for a time tested moral concept, one sometimes called the Golden Rule and which Kant, the millennium"s most prudent moralist, conjured up into a categorical imperative: Do unto others as you would have them do unto you; treat each person as an individual rather than as a means to some end. Under this moral precept we should recoil at human cloning, because it inevitably entails using humans as means to other humans" ends and valuing them as copies of others we loved or as collections of body parts, not as individuals in their own right. We should also draw a line, however fuzzy, that would permit using genetic engineering to cure diseases and disabilities but not to change the personal attributes that make someone an individual (IQ, physical appearance, gender and sexuality). The biotech age will also give us more reason to guard our personal privacy. Aldous Huxley in Brave New World, got it wrong: rather than centralizing power in the hands of the state, DNA technology has empowered individuals and families. But the state will have an important role, making sure that no one, including insurance companies, can look at our genetic data without our permission or use it to discriminate against us. Then we can get ready for the breakthroughs that could come at the end of the next century and the technology is comparable to mapping our genes: plotting the 10 billion or more neurons of our brain. With that information we might someday be able to create artificial intelligences that think and experience consciousness in ways that are indistinguishable from a human brain. Eventually we might be able to replicate our own minds in a "dry ware" machine, so that we could live on without the "wet ware" of a biological brain and body. The 20th century"s revolution in information technology will thereby merge with the 21st century"s revolution in biotechnology. But this is science fiction. Let"s turn the page now and get back to real science.

单选题America"s emphasis on the importance of education for everyone has spurred scientific research.

单选题It has been revealed that some government leaders ill-used their authority and position to get illegal money for themselves.

单选题A person who has lost his inner balance may soon feel

单选题Some newspapers in the west are notably biased.

单选题How to Determine a Topic for Research Because you are going to put a lot of your time and energy into your research project(项目), the topic is especially important. In many instances your instructor may give a specific(特殊的)topic. If this is done, you have little choice, but most instructors will permit or even welcome a slightly changed focus(中心)in a topic if it is supported by good thinking. In some of your classes, the instructor may present a suggested list of several topics from which you are to make a choice. If this is done, do not simply select the first idea that attracts your attention. It may be one with which you will soon become bored, or it may be one on which you would have difficulty finding all the necessary information. Looking at the topics, try to consider how you might go about developing each of them. When you find out what seems especially interesting and worthwhile(值得骄傲的), do a bit checking in the library to see if you can get the basic resources you will need. Choosing a good research topic does not necessarily mean finding something that has a lot written about it. Many times you will have to research around a topic in order to find out the most useful information. Exciting and original topics often come to mind by combining two completely different interests. Let us say that you are interested in child psychology(心理学的)and in sports. Perhaps you can combine these into a study of the effect that is watching(可得到的)on the subject, you can research the topic individually and, by putting your information together, then draw a conclusion.

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。请仔细阅读短文并根据短文内容回答其后面的问题，从4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} {{B}} What Is Death?{{/B}} People in the past did not question the difference between life and death. They could see that a person died when his heart stopped beating. People have learned, however, that the body does not die immediately when the heart stops beating. They discovered that we remain alive as long as our brain remains active. Today the difference between life and death is not as easy to see as in the past. Modern medical devices can keep the heart beating and the lungs breathing long after the brain stops. But is this life? This question has caused much debate among citizens in the United States. Many of them want a law that says a person is dead when the brain dies. A person should be considered dead when brain waves stop even if machines can keep the body alive. Such a law would permit doctors to speed removal (切除) of undiseased (没病的) organs for transplant (移植) operations. The brain is made of thousands of millions of nerve cells. These cells send and receive millions of chemical and electrical messages every day. In this way the brain controls the other body activities. Nerve-cell experts say it usually is easy to tell when the brain has died. They put small electrodes (电极) on a person's skull (头骨) to measure the electrical signals that pass in and out of the brain. These brain waves are recorded on a television screen or on paper. The waves move up and down every time the brain receives messages from the nerve cells. The brain is dead when the waves stop moving. Although there are people who oppose the idea of a law on brain block for variouis reasons, the idea of brain wave activity as a test of death is slowly being accepted.

单选题For most allergies, the best treatment is elimination of the bothersome substances from the sensitive person's environment. A. unnatural B. dangerous C. irritating D. surrounding

单选题Sally likes to {{U}}tease{{/U}} her brother about his girl friends.

单选题Enormous sums of money have been spent on space exploration.