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一个长方形的一边长为3m+2n,另一半比它大m-n,求这个长方形的周长.
一个长方形的一边长为3m+2n,另一半比它大m-n,求这个长方形的周长.已知关于x,y的多项式mx的立方+3nxy的平方-2x的立方-xy的平方+2x+Y中不含三次项,求2m+3n的值.( )the left ( ) the desk ,there is a bed .There are many birds ( ) the tree .In the ( ) of the lake ,there is a boat .
人气:192 ℃ 时间:2020-04-05 23:33:48
解答
(in) the left(of) the desk ,there is a bed .There are many birds (on) the tree .In the(middle)of the lake ,there is a boat .
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