产品的整体概念
参考答案：
指人们通过购买(或租赁)所获得的需要的满足，包括一切能满足顾客某种需要和利益的物质产品和非物质形态的服务。
Egyptian President decided to ______on Friday afternoon after an 18-day campaign against him, ending his thirty-year rule.
A．step down
B．break in
C．break down
D．step in
某土样做含水率试验，两次平行测定结果为15.4％和15.8％，则该土样的含水率为（）
A.15.4％
B.15.6％
C.15.7％
D.15.8％
