单选题His shoes were shined to perfection.

单选题Scientists Develop Ways of Detecting Heart Attack German researchers have (51) a new generation of defibrillators and early-warning software aimed at offering heart patients greater protection (52) 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 (53) by disruption to the heart's rhythm. Those most at risk are patients who have (54) suffered a heart attack, and for years the use of defibrillators has proved useful in intervening within seconds. These devices (56) 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 (57) of generating a six-channel electrocardiogram (ECG) within the body. This integrated system allows early diagnosis of (58) 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 (59) The overwhelming (60) of patients at risk will not have an implanted defibrillator and must for this reason undergo regular ECGs. "Many of the current programs only (61) into account a linear correlation of the data. We are, however, making use (62) a non-linear process that reveals the chaotic patterns of heart beats as an open and complex system," Hagen Knaf says, " (63) 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 (64) 600 patients who had suffered a subsequent heart attack, enabled the researchers to compare risks and to show (65) the new software evaluates the data considerably better.

单选题It"s prudent to take a thick coat in cold weather when you go out.

单选题Theodere Dreiser was one of the first American novelists to portray immoral characters without condemnation. A. hostility B. sadness C. blame D. pity

单选题We are restricted to a speed of 30 miles an hour in built-up areas.

单选题Blend together the eggs, sugar and flour.

单选题Two events have highlighted the tensions in recent years.

单选题The body snatchers used wooden shovels because

单选题She was a {{U}}puzzle. {{/U}}

单选题Major manufacturers have been using "quality circle" with undeniable success for more them two {{U}}decades{{/U}}.

单选题He {{U}}inquired{{/U}} whether it was possible to leave his suitcase at the railway station.

单选题The book made a great impact on its readers.

单选题The exercise that the researchers tried on their test subjects was

单选题A future government will be in the hands of an extraordinary man, who was wrong punished twice, then clawed his way to the top.A. a normalB. an abnormalC. an ordinaryD. a particular

单选题Charles Van Doren is no longer involved with TV. But game shows are still here, though they aren't taken as seriously. In fact, some of them try to be as ridiculous as possible. There are shows that send strangers on vacation trips together, or that try to cause newly - married couples to fight on TV, or that punish losers by humiliating them. The entertainment now is to see what people will do just to be on TV. Nowadays game shows on TV are taken more seriously than they used to be.A. RightB. WrongC. Not mentioned

单选题"The consequences” in the last paragraph result from people_____.

单选题Susan is looking for the dictionary, which she lost yesterday.

单选题Professor Baker is a co-worker of Professor Ayers.A. an advisorB. a discipleC. a rivalD. a colleague

单选题The Faraday effect was the first demonstration of a connection between magnetism and light. A. questioning B. proof C. achievement D. symbol

单选题It is Uobvious/U that he will win the game.