阅读短文, 下列问题

Miss Han: You bring(带来) many things to school, Kevin. Can you tell (告诉) me what are on your desk?

Kevin: Yes, I can. There is an eraser,a ruler, three pencils and a pencil box on my desk.

Miss Han: What is in your drawer(抽屉)?

Kevin: In my drawer, there are two books and a notebook.

Miss Han: What is that on the floor?

Kevin: It is my school bag.

Miss Han: Do you bring your lunch box(饭盒) to school?

Kevin: Yes, I do.

Miss Han: Where do you put it?

Kevin: I put it under my desk.

如图，抛物线y=x²+bx+c与x轴交于A，B两点，与y轴交于C点，若∠OBC=45°，则下列各式成立的是（　　）

要使人造卫星绕地球运行，它发射的时候的速度必须等于或大于____km/s，并且小于____km/s；要使卫星脱离地球引力不再绕地球运行，从而在太阳系中飞行，须使它的发射速度等于或大于____km/s；要使它飞到太阳系以外的地方去，它的发射速度必须等于或大于____km/s．（填速度的具体值）

如图，将一张等腰梯形纸片沿中位线剪开，拼成一个新的图形，这个新的图形可以是下列图形中的