【单选题】How many languages are designated by United Nations?
【单选题】( )How many languages have they learnt?
【单选题】How many languages are designated by United Nations?
【单选题】How many languages do you speak ?
B.
Three,and Chinese of course
【单选题】肝硬化门脉高压患者,出现全血细胞减少最主要的原因是