2. 外语
  3. Scientists Develop Ways of Detecting Heart Attack German researchers have(1)a new generation of defibrillators and early warn

Scientists Develop Ways of Detecting Heart Attack German researchers have(1)a new generation of defibrillators and early warn

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问题                         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 all implanted defibrillator(7)of generating a six-channel electrocardiogram(ECG) within the body. This integrated system allows early diagnosis of(8)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 the evaluation of ECG data(9).
   The overwhelming(10)of patients at risk will not have an implanted defibrillator and must for this reason undergo regular ECGs. "Many of the current programs only(11)into account a linear correlation of the data. We are, however, making use(12)a non-linear process that reveals the chaotic patterns of heart beats as an open and complex system." Hagen Knaf says."(13)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(14)600 Patients who had suffered a subsequent heart attack, enabled the researchers to compare risks and to show(15)the new software evaluates the data considerably better.
选项 A、are caused
B、caused
C、are to cause
D、have been causing
答案A
解析 此处的谓语动词必须使用被动语态，因为主语many of these cases指的是“病人，病例”，那就应该是“由……引起的”，故其他选项使用主动语态都不合适，况且后面by的介词短语已是一个明显的提示。
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