句型转换How much does your new car cost?1)_________ does your new car _________?2)__________is _________ __________ _________ your new car?这个是数学的数与式的运算(1/5m - 1/2n)(1/25m^2+1/10m+1/4n^2)(2a+1-b)^2-(a-b)(a+2b)(X-1)(X-2)(X-3
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