选择题:New Economy skeptics have a more pessimistic view

题目内容:
New Economy skeptics have a more pessimistic view of the future because they have a gloomier reading of the past. They say much of the equipment and software bought in the late 1990s went to waste. And they argue that recent downward revisions of historical GDP data solidify their case that the profit and productivity surge of the period was not as strong as first believed.
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3[计算题,5.8分]设A=|2 -2 0,-2 1 -2,0 -2 0|,求P使P^-1AP为对角

3[计算题,5.8分]设A=|2 -2 0,-2 1 -2,0 -2 0|,求P使P^-1AP为对角矩阵可逆矩阵P的第一列元素为 , , ;第二列

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圆心左右两边的内墙体呈对称样式,所以用户可在绘制左或右任意一边的内墙体后,再对其进行___________操作即可。

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图纸以短边作为水平边应为( )A.横式 B.卧式 C.竖式 D.立式

图纸以短边作为水平边应为( )A.横式 B.卧式 C.竖式 D.立式

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强制性标准,是建设工程必须完成的最低质量标准。(√×

强制性标准,是建设工程必须完成的最低质量标准。(√×

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