商朝的“外服”大都是迫于武力征服才承认商王的中心地位的，而西周的诸侯是周天子将宗族姻亲等分派到各地形成的。对此合理的解释是（ ）
﹣Wechat（微信）really influences people's life.
﹣ . It is easier for us to keep in touch with others.
