甲、乙两物体先后从同一地点出发,沿一条直线运动,它们的v-t图象如图所示,由图可知( )
A:甲比乙运动快,且早出发,所以乙追不上甲
B:t=20s时,乙追上了甲
C:在t=20s之前,甲比乙运动的快,t=20s之后乙比甲运动快
D:由于乙在t=10s时才开始运动,所以t=10s时,甲在乙前面,它们之间距离为乙追上甲前最大
Hello! I'm Linda. I have a good e-friend. Her name is Zhang Yun. Her English name is Betty. She is a Chinese girl, but she lives in the UK with her parents. Her father is a doctor and her mother is a teacher. She is ten years old. She call me big sister. She is good at English. She likes Chinese and I also like Chinese. She likes singing and playing basketball. This is my good e-friend. Do you want to know more?
23.8÷0.34=____÷34.