A-A+
Which of the following does the passage infer？
问题详情
Which of the following does the passage infer？
A．We now fully understand how risk factors trigger heart attacks.
B．We recently began to study how risk factors trigger heart attacks.
C．We have not identified many risk factors associated with heart attacks.
D．We do not fully understand how risk factors trigger heart attacks.
参考答案
正确答案：D
解析：本题为综合推理题。文章最后一句是“…intense research continues in the hope of further comprehending why and how heart failure is triggered.”(……人们继续进行深入的研究，以进一步弄清楚为什么会引发心力衰竭以及心力衰竭是如何发生的。)也就是说，由于还没有完全了解心脏病的发病原因，人们才继续进行深入的研究。
