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A．弹性动脉 B．肌性动脉 C．心内膜向心内突起 D．内弹性膜 E．内膜增厚
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当数据库的存储结构改变时，可相应修改 【7】 ，从而保持模式不变。
Passage Two Nick was tired of life. Every day was exactly the same. "What I need is a little adventure!" Nick thought as he waited at the bus stop one morning. Nick’s little adventure happened sooner than he had expected! While he was on the bus, reading his newspaper, the man sitting next to him suddenly pushed a large brown envelope in his hands. "Here, take this!" he murmured. Then he stood up and got off the bus before Nick could say a word. Nick sat There holding the envelope. It felt heavy. There were papers inside, or money perhaps. "I’d better hand it over to the police." He thought. There was a police station close to his office. But as he got off the bus, a man came up to him. He was obviously waiting for something. "He wants the envelope." Nick thought. Nick began to walk quickly and the man hurried after him. Nick started to run and the man began to run, too. But then, just before he go to the police station, Nick managed to lose the man in the crowds when he entered the police station, the man was no longer in sight. Inside the police station, the envelope was full of money—false money. "Obviously the man made a mistake." the inspector said, "He thought you was one of the gang! Well congratulations!" Nick felt like a hero. He could already see his name in all the paper. He could imagine an interview on television ! "However," the inspector went on, interrupting Nick’s daydreams. "I’m afraid I must ask you to keep quiet about this. We’re trying to catch some very clever thieves, and we don’t want them to know that we have some of the money. So you mustn’t say a word to anyone—even your boss! Sorry!" "So that’s that!" Nick said to himself on his way to the office. He was over an hour late. "I’ve had my little adventure, but I can’t tell anyone about it. So what’s the point I’ve even to make up an excuse to the boss!" As Nick got off the bus, a man came up to him. This man （）.
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