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湖泊、水库的水文、水质特征是怎样的？在湖泊、水库取水时，取水构筑物的位置选择应注意哪几点？通常采用哪几种类型的取水构筑物？
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What was Ponzi’s crime?回答下面的题目：From Ponzi to MadoffThe year was 1920．The country was the United States of America．The man’s name was Charles Ponzi．Ponzi told people to stop depositing money in a savings account．Instead，they should give it to him to save for them．Ponzi promised to pay them more than the bank．For example，a savings account might pay you$5 a year for every$1 00 you deposit．Ponzi，however，would pay you $40 a year for every $1 00 you gave him to hold．Many people thought this was a good plan．They began to give their money to Ponzi．How could Ponzi make so much money for people? This is what he did with the money people gave him：He used some of that money to pay other people who gave him money．However，he also kept a lot of the money for himself．Soon he had $250 million．This was a kind of theft，and it was against the law．The people who gave him their money didn’t think anything was wrong．Ponzi paid them every month，just like a bank．Ponzi continued this way of working for two years．Then one day，he didn’t have enough money to pay all the people．They discovered his crime，and he went to prison for froud．Ninety years later，people began to hear about a businessman in New York named Bernard Mad off．People said he gave good advice about money．They said when they gave him their money，he paid them a lot more than the bank．Mad off helped hospitals，schools，and individuals earn money．Over a period of 40 years，people gave him$1 70 billion．However，no one investigated what he did with themoney．The people who gave Mad off their money also didn’t think anything was wrong because he paid them every month．One day，Mad off didn’t have enough money to pay all the people he needed to pay．That’s when people discovered how Madoff worked：He was taking money from some people to pay other people， just the way Charles Ponzi did．However，this time，instead of losing millions of dollars，people lost billions．Madoff was accused of fraud，and United States government officials arrested him．He didn’t have to go on trial because he said he was guilty．In 2009，a judge sentenced him to 150 years in prison．Bernard Madoff’s crime was even bigger than Ponzi’s．It was the biggest fraud in history．The lesson of this story is clear：When something seems too good to be true，it probably is !For every$100 Ponzi promises to pay people__________．
对垂直安定面的垂直度检查应当在何时进行：（）.
粘度的大小可以用（），（），（）等方法来表示.
投资者和潜在投资者需要利用会计信息为企业制定经营目标．评价为实现目标而付出的行为是否合理，并在必要时采取改进措施；分析企业的财务状况，包括企业的偿债能力、营运能力和获利能力等。（ ）
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