⑩天掌 Teaching Plan on Advanced Mathematics 例2将」+r(x,y,x)按y,z,x 0 0 0 的次序积分 0.8 0.6 0.4 0.20.40.60.8 0≤≤ 2 0≤y≤1 tianjin Polytechnic univerityTianjin Polytechnic University Teaching Plan on Advanced Mathematics x y z D1：        0 1 0 2 y z x D1 例2 将    + 1 0 1 0 0 2 2 ( , , ) x y dx dy f x y z dz 按 y , z , x 的次序积分