A. Tell me about your picnic.
B. Dad, we had a picnic last Sunday.
C. We ate some food and drank some drinks.
D. Was it fun?
E. Then (然后) we played games and walked in the park.
F. Yes, it was.
____ ____ ____ ____ ____ ____
七巧板拼图
趣题巧解
数学应用
魔方复原
甲
66
89
86
68
乙
60
80
丙
90
用“频闪摄影”可记录物体相隔同样时间的不同位置,如图所示是甲、乙两个网球运动时的频闪照片。由照片可知, ____ 球做匀速直线运动, ____ 球的运动速度大(两空均选填“甲”或“乙”)。