题目内容
挖沟槽土方项目特征描述（ ）。
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__________1____________How could the love a grateful grass is offering, Repay the great warm of sunshine in spring?__________2__________Not until you become a parent can you fully appreciate parents’ love.❖_________3___________A drop received in need should be repaid with a flow of spring.❖______4________Keep in mind the well digger when you drink the water.❖_________5________________To be grateful and want to repay, It’s the best virtue and best way.
某测量点的真空度为10kPa,则该点的绝对压力为（） （大气压：101.3kPa)
某测量点的绝对压力为200kPa，则该测量点的表压为（）（大气压：101.3kPa)
参与者之间主要的关系是 。
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