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[例文]Last Sunday afternoon, I was in a bookshop.Suddenly I saw a short man behind me. He stole my purse and ran out of the shop. I followed him but he ran faster than me. I shouted "stop thief! stop thief!" A policeman came to help. Then a woman came and told us "I saw him. He ran along the street and then turned right at the first crossing." The policeman started to run and he ran faster than me. Soon he stopped the thief and I got my purse back.  相似文献   
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利用系统诊断的方法对影响畜牧兽医专业学生学习质量的因素进行了主因素分析,确立了影响学生学习的主要因素。  相似文献   
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