In ancient times wealth was measured and exchanged in things that could be touched:food,tools,and precious metals and stones.Then the barter system was replaced by coins,which Still had?real value since they were pieces of rare metal.Coins were followed by fiat money,paper notes that?have value only because everyone agrees to accept them.
Today electronic monetary systems are gradually being introduced that will transform money into?even less tangible forms,reducing it to a series of"bits and bytes",or units of computerized.information,going between machines at the speed of light.′Already,electronic fund transfer allows money to be?instantly sent and received by different banks,companies,and countries?through computers and telecommunications devices.
According to the passage,which of the following was the earliest kind Of exchange of wealth?《》（）
【考情点拨】事实细节题。【应试指导】由第一段第一句可知，最早可以充当财富交换物的是那些能触摸到的东西：食物、工具、稀有金属和石头。A符合题意。
我国独立自主的外交政策体现在哪些方面？我国为什么必须实行对外开放？
简述人民民主专政理论的基本内容。
简述走农村包围城市，武装夺取政权道路的必要性。
简述实践及其对认识的决定作用。
遵义会议集中解决了党的政治路线问题。
生产方式是社会发展的决定力量。
对外开放是我国的一项长期的基本国策，实行这一国策的前提和基础是（ ）
计划和市场是（ ）
加强党的自身建设，必须放在首位的是（ ）
中国共产党的立党之本、执政之基、力量之源是（ ）
