人们采用玉米经酵母菌发酵产生酒精来替代汽油。若每吨玉米可转化为m吨葡萄糖，现有生产46吨酒精，理论上需要玉米(原子量：C—12，H—1，O—16)[]A．m/90吨B．90/m吨C．180/m吨D．9

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