题目

I always think there is not enough time. For example, I have just taken a three­day holiday. But when I look up, I just feel that it's only one day. There went a proverb, “Time is money.” Now I want to say, time is much precious than money, because when money is spent, we can earn some more again. Therefore, when time is gone or lost, never will it return. Time goes without noticed. The time for our study and work is usually limiting. So I think we must make well use of our time. But it's a pity that I am always not aware of the importance of time when it's too late. So I think I s如图，是某复印店复印收费y(元)与复印面数（8开纸） x(面)的函数图象，那么从图象中可看出，复印超过100面的部分，每面收费（     ）   A、0．4元   B、0.45 元  C、约0.47元   D、0.5元