夏朝是我国历史上第一个奴隶制王朝它的建立标志着

A．国家机构的建立

B．我国早期国家的产生

C．我国奴隶社会的结束

D．统治范围的扩大

Which of the following is NOT part of the basic inventory equation（）

A. Beginning inventory + purchases = ending inventory + cost of goods sold. 

B. Purchases - ending inventory + beginning inventory = cost of goods sold. 

C. Beginning inventory - ending inventory - cost of goods sold = purchases.