pencils are produced in a perfectly competitive industry.The demand function for pencils is given by D(p)=100-p.The average cost of producing y units is given by AC(y)=4+(2-y)^2问：Determine the individual supply curve of each firm and find the lon

Are these your pencils? Those are pencils hers? whose are these pencils?和whose pencils are these? these are your pencils.[对画线部分提问】 【 】pencils are [ These pencils are red ,and - - - -e pencils are green. Are there enough pencils是什么意思 Those are pencils.对pencils部分提问 ___ ___those. These are___(we) pencils,and those are ___(they) pencils. pencils are produced in a perfectly competitive industry.The demand function for pencils is given by D(p)=100-p.The average cost of producing y units is given by AC(y)=4+(2-y)^2问：Determine the individual supply curve of each firm and find the lon produced These pencils are red.变一般疑问句. These are pencils-boxes哪里错了? are these your pencils同义句 htese are my pencils 改为疑问句 are these your pencils?改为肯定句 These are my pencils改为单数句 Where are my pencils 改为单数形式 Those her pencils are red 改错