在社会主义市场经济条件下，企业往来中“一手交钱一手交货”的供求模式已经不是主要的了。代之而来的是各单位之间的业务往来，往往是款项支付与商品、材料到货不在同一时点发生。经常会出现采购的商品材料先到，而发票未到的情况。以材料为例，由于材料验收入库后就要领... Under the conditions of a socialist market economy, the mode of supply and demand, where “one-handed delivery of goods with one hand” is not the major one, is not the main one. Instead, the business dealings between the various units are often the payment of money and goods, materials arrive at the same time not happen. Often there will be purchases of goods first, and the invoice has not yet arrived. Take materials as an example