A : What's your favourite invention?

B : Of course computers. They are very important in people's life now.       

A: I like computers, too. I think they will be used even more widely in the future.

B: I agree with you.        

A: I usually use my computer for looking up information reading books and playing games;

B: Do you like shopping online?

A : Yes, of course.       

B: That's true. However, sometimes it isn't safe to buy things online.

A: Yes, so we should be careful when shopping online. What do you like to do with your computer?

B:        

A: You must have many net friends.

B: Sure. I have about 10 friends who are from different countries.

A:        

2015年3月21日中央电视台一则新闻引起社会强烈反响和广泛好评：陕西省宝鸡市92岁的退休老人杨希元几十年如一日，义务辅导有志青年学生学习英语，参加过辅导的年学生从他那里学到不少的英语知识和做人的道理。从中我们可以悟出（  ）

①充分发挥主观能动性，即使只有一个人的力量也能使人生大放异彩

②学习是获得知识的重要途径

③认识一般来源于直接经验，有时也来源于间接经验

④人生价值是社会价值和自我价值的统一

95－53=____

之前需要109枚审批公章办成的事，如今却只要1枚。天津滨海新区行政审批局将109枚公章永久封存，让不必要的审批已成为历史。这表明（   ）。