A —limited liability J —unfair competitionB —business scope K —wholesalerC —commercial channels L —uncollectible accountD —bulk sale M—spare partsE —public ownership N —payment by installmentF —state-owned enterprise O —repayment scheduleG —foreign-funded enterprise P —public subsidiesH —commercial transaction Q —cash on deliveryI —retail tradeExamples：(K)批发商(C)商业渠道