在现阶段,我国社会的主要矛盾是人民日益增长的美好生活需要和()之间的矛盾。
太阳系以19.6km/s的速度向武仙座方向运动,一年内飞过多少天文单位?
Also known as "digital marketing" and "e-marketing," social media marketing has purpose-built data analytics tools that allow marketers to track how successful their efforts are.()
Cold calling is the marketing process of approaching prospective customers or clients—typically via telephone, by email or through making a connection on a social network—who were just expecting such an interaction.()