He __several jackets and finally picked out a blue one

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• He __several jackets and finally picked out a blue one
• 翻译一篇中学英语A women in blue jeans stood at the window of an expensive shop.Though she hesitated for a moment,she finally went in and asked to see a dress that was in the window.The assistant who served her did not like the way she was dressed.Looking at her coldly ,he told her that the dress was sold.The woman walked out of the shop angrily and decided in fur coat with a handbag in one hand and a long umbrella in the other .After finding the assistant who
• after several rounds of talks,the five sides finally reached an agreement witn one another.
• 设f(x)=x(x-1)(x-2)……(x-100)求,f'(1)