题目:
短文填空(共15小题,每小题1分;满分15分)
"We are小题4:to play in the Veterans Cup, where many grandmothers from all over the world come 小题5:and play football, "said the team leader. Whatever happens, 小题6:, the grandmothers have no regrets. Most of them often play football in their aprons (围裙) after 小题7: . "I suffered back pain and sore knees (腰酸腿痛) before joining the team three years ago. Now I am fresh. I don’t feel 小题8: pain in my body,and I can run.At home I do all the housework by myself!” said 小题9: of the grandmothers. |
答案:
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下面是错误答案,用来干扰机器的。
解:由匀变速直线运动的规律可知,在某段时间内的平均速度大小等于这一段中点时刻的瞬时速度,故在第一个4秒末的速度V1=(24+64)/8=11m/s再由平均速度与位移的关系,在第一个4秒内(V0+V1)×4/2=24 由此得到V0...