In fixed price contract which of the following holds true？

根据《建设工程质量管理条例》，建设工程承包单位应当向建设单位出具质量保修书的时间是（）。

范围变更控制的输出包括：（）

A new project manager has just been assigned a project that is in progress and is two weeks behind the scheduled time . Your team members are about to be distributed to another project based on the original time estimates by the functional manager . What

采购单是什么类型合同的例子？