单项选择题商业模式画布中的客户细分指的是企业所瞄准的使用服务或购买产品的消费者群体。 A、正确 B、错误
单项选择题The country's chief exports are coal, cars and cotton goods, cars ______ the most important of these.A.have beenB.areC.beingD.are being
