①人们上网浏览、发E-mail②人们使用粮票、布票购买东西③70年代住草房,80年代住瓦房,90年代住楼房④我国社会保障体系逐步建立和完善起来
A: ①②④
B:②③④
C:①③④
D:①②③④
读图“亚洲某岛国气候资料”,完成下列问题下列各题。
函数y=log123x-2的定义域是( )
— He's never advised to achieve a balance between his job and hobbies, ________? — _______. His parents and teachers often offer him advice.