题目内容
某施工企业在施工方案设计阶段对工期质量投资进行优化设计，提出F1、F2、F3三个方案，数据如下表，则最优方案是( )。 权重 满足程度 F1 F2 F3 工期 0.3 80 40 30 质量 0.5 40 90 70 投资 0.2 70 60 90
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Questions 11 to 18 are based on the conversation you have just heard.
听下面五段对话或独自。每段对话或独白后有几个小题，从题中所给的[A]、 [B]、[C]三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有五秒钟的时间阅读各个小题；听完后，各小题将给出五秒钟的作答时间。每段对话或独白读两遍。 What does the man think of the present
已知某市房地产买卖中，应由卖方缴纳的税费为正常交易价格的7%，应由买方缴纳的税费为正常交易价格的5%。试求以下特殊交易情况下的房价。 买卖双方在合同中写明“卖方承担买卖中涉及的全部税费，买方支付给卖方4750元/m2的房价款”，则卖方实际得到的金额应为( )元/m2。
Time spent in a bookshop can be most enjoyable, whether you are a book-lover or merely there to buy a book as a present. You may even have entered the shop just to find shelter from a sudden shower. Whatever the reason, you can soon become totally unaware of your surroundings. The desire to pick up a book with an attractive dust-jacket is irresistible, although this method of selection ought not to be followed, as you might end up with a rather dull book. You soon become engrossed in some book or other, and usually it is only much later that you realize you have spent far too much time there and must dash off to keep some forgotten appointment--without buying a book, of course.This opportunity to escape the realities of everyday life is, I think, the main attraction of a bookshop. There are not many places where it is possible to do this. A music shop is very much like a bookshop. You can wander round such places to your heart’s content. If it is a good shop, no assistant will approach you with inevitable greeting: "Can I help you, sir" You needn’t buy anything you don’t want. In a bookshop an assistant should remain in the background until you have finished browsing, then, and only then, are his services necessary. Of course you may want to find out where a particular section is, but when he has led you there, the assistant should retire carefully and look as if he is not interested in selling a single book.You have to be careful not to be attracted by the variety of books in a bookshop. It is very easy to enter the shop looking for a book on ancient coins and to come out carrying a copy of the latest best-selling novel and perhaps a book about brass-rubbing something that had only vaguely interested you up until then. This volume on the subject, however, happened to be so well illustrated and the part of the text you read proved so interesting that you just had to buy it. This sort of thing can be very dangerous. Apart from running up a huge account, you can waste a great deal of time wandering from section to section. "Dust-jacket" in the first paragraph probably means ().
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