What is the main idea of the last paragraph?
A.Many people are still unable to afford the cost of physical exercises.
B.Nobody should take part in physical activity in order to be an athlete.
C.Moderate physical exercise is usually enough for ordinary people.
D.Old or sick people should only take part in physical exercises of the slowest type.
第4题
A、合成汽包连、定排可全部关死
B、合成废锅炉水即使合格也不能停碱液泵,必要时可打清水以防冻线
C、对各防冻点的巡检要求每个班1次
D、合成汽包连排关死,定排打开
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!