计算：（xy-x2）•xyx-y=______．_爱下问搜题

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问题解答题

计算：（xy-x²）•

xy

x-y

=______．

答案

原式=-x（x-y）•

xy

x-y

=-x²y．

故答案为-x²y．

选择题

The place _____ the bridge is supposed to be built should be ____ the cross-river traffic is the heaviest.

A. which; where
B. at which; which
C. at which ; where
D. which ;in which

多项选择题

一般来讲，决定利率水平的主要基本因素有( )。

A．年利润率

B．平均利润率

C．借款市场中资金供求比对状况

D．经营成果的预测方案

E．企业利润率