第1题
第4题
A.spare no efforts to increase life expectancy
B.be aware of the rapid graying of our society
C.apply science and technology in everyday life
D.try our best to improve the lives of old people
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!