尔雅 智慧树 mooc

Thecompanyajustsitacountseverymonth.Thetotalrentrevenueforthemonthis$，amongwhich$isreceivedinthecurrentmonth，and$isreceivedinnextmonth.Whatisthetotalrentrevenueforthenextmonth.

  尔雅 智慧树 mooc


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