已知盐的热分解温度:NH4HCO3 36℃; NaHCO3 270℃; NH4Cl 340℃; Na2CO3>850℃
Mr. Smith gave the tickets to all the students except _______ who had already seen the movie.
当地时间2014年2月7日晚,索契冬奥会隆重开幕,******应邀出席开幕式。***在俄期间哪些语种的随行翻译最忙碌( )