The main reason why people fail to act when they stay together is that ______.
A.they are afraid of emergencies
B.they are reluctant to get themselves involved
C.others will act if they themselves hesitate
D.they do not have any direct responsibility for those who need help
第9题
制定运动计划时,首先进行()。
A.医学体检
B.健康状况调查和评价
C.体适能测试
D.心理咨询
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