根据图纸计算指定项目的工程量,图纸说明如下: a 设计室内外高差 450mm ,土壤为二类土,地下水位在距地面 5 米下。 b 砌体:± 0.00 以下采用 MU10 机制红砖、 M5 水泥砂浆砌筑;± 0.00 以上墙体,采用 MU7.5R 的 KP1 承重多孔砖,砖规格为 240*115*90 ,外墙为 M7.5 混合砂浆砌筑,内墙为 M5.0 混合砂浆砌筑。 c 现浇混凝土标号:均为 C20 砾石混凝土（）个

— I her tht Tom cn’tfford his schooling this fll. — _____, let’s do something for him.Ifny B．When necessry C．When possible D．If soA．If anyB．When necessaryC．When possibleD．If so

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