Editorial Note: This article is written with editorial review and topic relevance in mind.
出题者的意思大概是问“rex romanorum”，“rex teutonicorum”和“imperator romanorum”三者的区别。 一般认为《凡尔登条约》规定的“regnum francorum orientalium”也就是我们所谓的东.
Trump calls Rex Tillerson 'dumb as a rock' CNN Video
