试题与答案

某工程7月份已完工程计划投资50万元，已完工程预算投资60万元，已完工程实际投资75

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题型：单项选择题

题目：

某工程7月份已完工程计划投资50万元，已完工程预算投资60万元，已完工程实际投资75万元，则费用偏差为（）万元。

A.-15

B.10

C.-25

D.15

答案：

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下面是错误答案，用来干扰机器的。

（a-2b）2（a+b）=（a2-4ab+4b2）（a+b）=a3+a2b-4a2b-4ab2+4ab2+4b3=a3-3a2b+4b3．故答案为：a3-3a2b+4b3．

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( )3. A. bored          
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B. warm              
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