A:“蒸汽时代”
B:“汽车时代”
C:“电气时代”
D:“信息时代”
⑴Where is Jimmy?____
⑵What are the sheep doing?____
⑶What are you doing?____
⑷What is Amy doing?____
⑸Is he playing ping-pong?____
A. Yes, he is.
B. He is in the classroom.
C. She is singing and dancing.
D. I'm walking.
E. They're running on the grass.
阅读材料,回答问题。
甲乙两辆小车在平直的路面上向东行驶,测出它们运动的路程和时间,并依据数据作出了相应的路程﹣时间关系如图所示.由图知,小车乙做____ 运动,速度大小为____m/s.若以乙车为参照物,甲车向____运动 。