1個回答
Amy助教
2018-10-23 18:15
該回答已被題主采納
同學(xué)你好,Wd=63/(63+220)=0.223, We=220/(63+220)=0.777
該回答已被題主采納同學(xué)你好,Wd=63/(63+220)=0.223, We=220/(63+220)=0.777