About 200 different strains of virus can produce colds; they are spread by direct or indirect contact.

 
  • 約有兩百種不同病毒株可造成普通感冒。經(jīng)由人與人間的接觸傳播。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan