一）战国时期，地处西北地区的秦国，在中原各国忙于征战之际开始走上富国强兵之路。秦王朝采取一系列措施发展农业和手工业生产，扩大产品交流。西北地区的牛马，巴蜀地区的木材和矿产品，为秦统一中国提供了物资上的保证。大商贾已在统治集团中得势，商人出身的相国吕不... A) During the Warring States Period, the Qin State, located in the northwest region, started to embark on the path of becoming rich and strong while the Central Plains countries were engaged in expeditions. The Qin Dynasty adopted a series of measures to develop agricultural and handicraft production and expand product exchange. The cattle and horses in the northwest region and the wood and mineral products in the Bashu region provided the material guarantee for the reunification of Qin. Big merchants have gained the upper hand in the ruling clique