A:国家之间的矛盾在加剧
B:和平与发展成为当今世界的主题
C:市场经济制度得到普遍认可
D:缓和与紧张、和平与动荡并存局面
Mary got an ______ from Lisa the day before yesterday. Lisa ______ her to go to her birthday party.
选出表述错误的一项( )
①铁钉表面产生气泡;②液体由无色逐渐变为浅绿色;③铁钉的质量减轻;④液体的质量减轻.
In British English, we call it “film”. In American English, what do we call it?