贵阳到凯里火车票:a basket of/ a box of 后的名词是否都用复数形式

a basket of/ a box of 后的名词是否都用复数形式 A.In spite of B.Rather than {(a-b)/(a+b)}+{(b-c)/(b+c)}+{(c-a)/(c+a)}+{(a-b)(b-c)(c-a)/(a+b)(b+c)(c+a)} A*B=A+B/AB a^2+b^2/a+b 求证:|a^2-b^2|/|a|≥|a|-|b| |a|+|b-a|-|c-a|-|a+b| 化简:(2a-b-c)/(a-b)(a-c)+(2b-c-a)/(b-c)(b-a)+(2c-a-b)/(c-a)(c-b) There are ___ more apples in this basket than in that one.A.many B.much 选择哪一个? 求a/((a-b)(a-c))+b((b-c)(b-a))+c/((c-a)(c-b))