单词拼写
Spending time in a bookshop can be enjoyable. If you go to a good bookshop, no assistant will come near to you and say, “Can I 1h you?” You needn’t buy anything you don’t want. You may try to find out 2w the book you want is. If you fail(没有找到), the assistant will lead you there and 3t he will go away. It seems that he is not 4i in selling any books at all. There is a story about a good bookshop. A medical student 5f a very useful book in the bookshop, but it was too 6e for him to buy. He couldn’t get it from the library, either. So every afternoon, he went there to 7r a little. One day, however, he couldn’t find the book from its 8u place. He was leaving when he saw the assistant signing to 9h . He was surprised that the assistant 10p to the book in the corner. “I put it there so that people wouldn’t see it and buy it,” said the assistant. Then he left the student by himself to go on with his reading.
科的发展中起到了非常重要的作用。下列分类标准合理的是