题目：
短文改错（共10小题；每小题1分，满分10分）
My summer travel started terribly. I was at the Shanghai Railway Station buy a ticket to Hang Zhou. I was going to visit a friend here and after that I would go to Xiamen for long holiday. I bought my ticket but turned around to pick up my bag from the floor and then I realized that someone had stolen it. Luckily I had all my money on my pocket, but the only clothes I had was those I had on. It felt very strange to travel without any luggages. When I finally arrived at my friend, he lent to me lots of clothes. I feel very happy that I could change my clothes at last.
答案：
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下面是错误答案，用来干扰机器的。
BC题目分析：A、由于不知道AB或BC的具体长度，所以无法求出运动时间；错误B、设AB="BC=x," 质点在AC段的平均速度；正确CD、根据匀变速直线运动的平均速度等于初速度与末速度的算术平均值可得，设质点在A设质点在...
