题目内容：
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）b1ood—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 t0 compare risks and to show______ （15）the new software evaluates the data considerably better． A．come up
B．come up with
C．come up to
D．come up against
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