题目

I did very badly at school. My headmaster thought I was_______and when I was 14 he said, “You’re never going to be_______but a failure.”After five years of_______jobs, I fell in love with a very nice middle-class girl. It was the best_______that could have happened to me. I _______I wanted to do something positive (积极地) with my life because I wanted to prove to _______that what people said about me was_______. Especially her mother, who had said to me, “Let’s_______it, you’ve failed at everything you’ve ever done.” So I tried hard with my_______and went to college. My fir重为G的物体在竖直向上的力F1和F2的作用下，v-t图象分别为如图①②，则（　　）A．F1=F2B．F1＜F2C．F1＞F2D．无法确定