問題詳情
【題組】74．The experiments done by some scientists showed that ________.
(A)some male patients were asked to ride bicycles regularly in the experiments
(B)the physical exercise had more harmful effect on the hearts of the untrained patients
(C)the physical exercise was harmless to the male patients with heart trouble
(D)the physical exercise could be helpful for the patients to take in more oxygen
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)