Last week, we asked some students about how to1 friends and if friends should 2the same or different. Here is what one of the students said.

    Jeff Green, a shy boy, said he is quieter and more serious than most kids. That's3he likes reading books and studies much 4 in class. He and his friend Yuan Li have one thing in 5: they are both quiet. Jeff thinks friends are like books — you don't need a lot of them, as long as they are good.

P、Q是同一直线上相距10米的两点，甲、乙两小车从P点出发向Q运动，它们运动的s-t图像如图所示，由图像可知                 (        )

马路上出现交通事故应打事故电话（     ）