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房地产行政主管部门发现交易双方的成交价格明显低于正常市场价格时()。
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对于键值序列{12，13，11，18，60，15，7，18，25，100}，用筛选法建堆，必须从键值为(11)的结点开始。
听力原文： There are a lot of students who dislike studying history. The problem is not necessarily that the subject is boring, it is just hard to get excited about something when it is presented in a boring manner. ! had a different experience though. My American history professor, Dr. Anais Ninn, was unforgettable. When Dr. Ninn described events they seemed to leap from the pages. It was partly because she made it sound like a live radio news report.
Dr. Ninn imitated John Adams, a well-known silversmith of the revolutionary period. John Adams helped to organize the colonists who were angry about the way the British seemed to control their lives through unfair taxes. Dr. Ninn imitated the way John Adams had given his speeches and helped to plan the revolutionary activities. ! can see her now with her hand raised above her head and shouting at the class. She told how Adams had come up with a plan in 1775 to use two lanterns as signals if the British were going to attack by sea. If the scout saw the lamps, he was supposed to jump on a horse and warn the rest o the Americans of the attack.
Professor Ninn described the battles to us in detail. The weapons they used at those times were primitive, but the effects were terrible. If a man was wounded then, he would probably die from the infection. As Professor Ninn described these battles, I felt as though history had come alive.
Why does the speaker think some students don' t like history？
A．modernsB．catsC．modemsD．modulates
A．数据库设计B．数据通讯C．数据定义D．数据维护
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