【简答题】食品的变质包括品质下降、()和安全性下降、()下降。
【单选题】We tried to stop the flames from spreading, but we knew it was _________. [ ]
【判断题】任何一台 能上网的电脑都可以查图书馆的馆藏目录信息。
【单选题】We first met on a train in 2000. We both felt immediately that we ______ each other for years.
【单选题】一般用于洽谈、磋商等场合,注视的位置在对方的双眼与额头之间的三角区域内,指的是( )