Several studies have found that the coronary patient who exercise most actively have half or less than half the chance of dying of a heart attack as those who are sedentary.
B.have half the chance, or less, of dying of a heart attack than those who are sedentary do
E. are at least fifty percent less likely than those who are sedentary to die of a heart attack
我觉得b好些呀，可是答案是e,不太明白
请英雄们帮我看看。谢谢大家了！
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