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某电力安装公司承接一项200MW火力发电厂全部机电安装工程，工程内容包括：锅炉机组、汽轮发电机组、厂变配电站、化学水车间、制氢车间、空气压缩车间等。其中锅炉汽包重102t，安装位置中心标高为52.7m；发电机定子158t（不包括两端罩），安装在标高+10.00m平台上。且汽机车问仅配置一台75/20t桥式起重机；压力容器和管道最高工作压力为13.73MPa。由于工期紧和需要节约成本，水冷壁安装第一次采用地面组合整体柔性吊装新工艺。由于该项目经理部注重项目成本各阶段的控制，对成本控制的内容责任落实，重点突出，方法得当，并定期开展“三同步”检查活动，因此工程竣工后取得了较好的经济效益。

汽机间热力管线钢管用量大，安装公司项目部编制了甲、乙两套工艺管线安装施工方案，两套方案的计划用工日数均为2500个，预算日平均工资为50元，计划用钢材500t，计划价格为7000元/t。方案甲为买现货，价格为7100元/t，方案乙为第15d后取货，价格为6800元/t。如按方案乙实行，则人工窝工150工日，机械台班费需增加20000元，现场管理费需增加15000元。通过施工进度分析，方案甲和方案乙两种情况均不影响工期。

本工程中哪些施工方案需作经济分析？

答案

参考答案：

本工程中发电机定子设备吊装运输、锅炉锅筒吊装、锅炉钢结构焊接安装、高压管道（如主蒸汽、主给水）焊接、水冷壁整体柔性吊装、整套负荷试运转和无损检测施工方案需作经济分析。

单项选择题

Passage Three

Some people would say that the Englishman’s home is no longer his castle, and that it has become his workshop. This is partly because the average Englishman is keen on working with his own hands and partly because he feels, for one reason or another, that he must do for himself many households for which, some years ago, he would have hired professional help. The main reason for this is a financial one. The high cost of labor has meant that builders’ and decorators’ cost have reached a level which makes them prohibitive for house-proud English people of modest means. So, if they wish to keep their houses looking bright and smart, they have to tackle some of the repairs and decorating themselves. As a result, there has grown up in the post-war years what is sometimes referred to as the "do-it-yourself movement".
The "do-it-yourself movement" began with home decorating but has since spread into a much wider field. Nowadays there seem to be very few things that can’t be made by the "do-it-yourself movement" method. A number of magazines and handbooks exist to show hopeful handymen of all ages just how easy it is to build anything from a coffee table to a fifteen foot (4.5 meters) sailing dinghy. All you need, it seems, is a hammer and a few nails. You follow the simple instructions step by step and, before you know where you are, the finished article stands before you, completely in every detail.
Unfortunately, alas, it is not always quite as simple as it sounds. Many a budding "do-it- yourself" has found to his cost that one cannot learn a skilled craftsman’s job overnight. How quickly one realizes, when doing it oneself, that a job which takes the skilled man an hour or so to complete takes the amateur handyman five or six at least. And then there is the question of tools. The first thing the amateur learns is that he must have the right tools for the job. But tools cost money. There is also the wear and tear on the nerves. It is not surprising then that many people have come to the conclusion that the expense of paying processional to do the work is, in the long run, more economical than "do-it-yourself "

Many Englishman join in the movement of "do-it-yourself", because ______.

A．they are skilled handymen

B．they are proud of their houses

C．they can’t afford professional help

D．they are mean
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单项选择题 A1型题

WHO高血压与冠心病专家委员会1959年对青少年血压上限的界定标准是（）

A.12岁以下为135/85mmHg，13岁以上为140/90mmHg

B.13岁以下为135/85mmHg，14岁以上为140/90mmHg

C.12岁以下为130/85mmHg，13岁以上为135/90mmHg

D.14岁以下为135/85mmHg，15岁以上为140/90mmHg

E.14岁以下为135/85mmHg，15岁以上为140/90mmHg
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