英语专有名词Beijing和BeiJing哪个是对的.

英语专有名词Beijing和BeiJing哪个是对的. visit to Beijing 和visit Beijing 是不是都是对的? 哪个英文句子对呢this is beijing sky 和 this is a beijing sky和 this is Beijing Peking和Beijing的区别 像theYellow River,the West Lake ,Beijing University,等专有名词包含的词 北京烤鸭的英语Beijing Duck 还是Peking Duck偶的词典是　Beijing Duck 色拉英语的Bil peking和beijing一样的吗? beautiful beijing 英语作文 北京的英语是Beijing上海的英语是Shanghai西藏的英语为什么是Tibet? he has gone to Beijing对划线部分提问 划线部分是Beijing ______ ______ he The capital of China is Beijing.（对划线部分提问）注：划线部分是Beijing