It was Saturday. Mike stayed at home alone(单独地). His parents went to visit his grandparents in another city. He did his homework and read books. After lunch, he watched TV and played basketball on the playground with Jack. He felt very tired. In the evening, his parents came back and brought him some presents. They were a schoolbag and a basketball. Mike felt very excited!

给出函数f（x）=a^2x﹣1+2（a为常数，且a＞0，a≠1），无论a取何值，函数f（x）恒过定点P，则P的坐标是（　　）

“当年曾分田翻身当家作主人，今岁又分田勤劳致富奔小康”。对联中的两次“分田”指的是（    ）

2015年，我国发明专利申请受理量达110.2万件，连续5年居世界首位。取得这一成绩的根本原因是（    ）