题目内容

某施工企业经合理的投标取得一路基工程合同，并按合同要求组建了项目经理部。该项目经理部在研究合同文件时注意到：(１）该合同工期一年；②合同特殊条款中有这样的约定：“单项工程量变化正、负不超过15％时，合同单价不予调整，……”。③路基土石方的工程量清单数量为49万m3。单价为综合单价，其中石方量按工程总量的20％考虑。
在工程实施过程中有如下事件：
1．在工程实施中，项目经理部与监理、设计、建设单位共同确认土石方的工程量实际为168万m3，其中石方量为工程总量的80％。
2．为控制施工成本，企业根据材料的市场单价编制了标后预算文件，并下达到项目部。项目部再将成本控制责任分解到部门、班组、个人，做到每个部门有责任，人人肩上有担子。
问题：
1．根据背景材料，施工单位向建设单位提出了土石方单价变更的要求，你认为土石方单价变更是否合理？并说明理由。
2．企业编制标后预算的依据是否全面？并说明理由。

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项目部的竣工档案中还缺少哪些内容？

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项目部应该如何索赔增加的降水费用？

保险公司应按间接法报告公司经营活动的现金流量。()