某工程，业主在招标文件中规定，工期T（周）不得超过80周，也不_爱下问搜题

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某工程，业主在招标文件中规定，工期T（周）不得超过80周，也不应短于60周。某施工单位决定参与该工程的投标。在基本确定技术方案后，为提高竞争能力，对其中某技术措施拟定了三个方案进行比较。方案一的费用为C=100+4T；方案二的费用为C=150+3T；方案三的费用为C=250+2T。这种技术措施的三个比选方案对施工网络计划的关键线路均没有影响。各关键工作可压缩的时间及相应增加的费用见表3-36。假定所有关键工作压缩后不改变关键线路。

如果该工程的施工网络计划如图3-8所示，则压缩哪些关键工作可能改变关键线路？压缩哪些关键工作不会改变关键线路？

答案

参考答案：

压缩关键工作C、E、H可能改变关键线路，压缩关键工作A、M不会改变关键线路。

完形填空

Children find meanings in their old family tales．
When Stephen Guyer’s three children were growing up, he told them stories about how his grandfather, a banker,   1  all in the 1930s, but did not lose sight of what he valued most. In one of the darkest times   2  his strong-minded grandfather was nearly  3  , he loaded his family into the car and   4   them to see family members in Canada with a   5  , “there are more important things in life than money”.
The   6  took on a new meaning recently when Mr. Guyer downsized to  7   house from a more expensive and comfortable one. He was 8     that his children, a daughter, 15, and twins, 22, would be upset．To his surprise, they weren’t. 9     , their reaction echoed (共鸣) their great-grandfather’s．What they 10   was how warm the people were in the house and how 11    of their heart was accessible.
Many parents are finding that family stories have surprising power to help children
  12   hard times. Storytelling experts say the phenomenon reflects a growing   13    in telling tales, evidenced by a rise in storytelling events and festivals.
A university   14   of 65 families with children aged from 14 to 16 found kids’ ability to 15  parents’ stories was linked to a lower rate of anger and anxiety.
The 16  is telling the stories in a way children can 17   . We’re not talking here about the kind of story that 18  , “ When I was a kid, I walked to school every day uphill both ways, barefoot in the snow.” Instead, we should choose a story suited to the child’s 19 , and make eye contact (接触) to create “a personal experience”. We don’t have to tell children 20   they should take from the story and what the moral is.

C．arrangement

C．disappointed

A．talked about

B．cared about

C．wrote about

D．heard about

问答题简答题

瘦身裤的作用是什么？