题型:填空题 Read and choose. (给左边句子选择正确的答句)( )1. How many pears are there? ( )2. How much are the sandals? ( )3. Can you help me? ( )4. How much is the sweater? ( )5. Are they horses? A. Yes, I can. B. There are 12. C. It's 98 yuan. D. They are 19 yuan. E. Yes, they are. 查看答案
题型:填空题 物体做直线运动位移—时间图象如右图所示,关于图象表示的运动过程和物理意义的说法中,正确的是:()A.图中0时刻,即开始计时,距坐标原点已经有了位移S1B.AB段表示物体作匀速直线运动,t1时刻距坐标原点位移为S2C.BC段表示物体作匀速直线运动,速度没有变化D.CD段表示物体作匀减速直线运动,最后回到起点,位移为0 查看答案