“(故宫)那些太和殿前永存的铜缸记录着中国人在20世纪第一年所遭受的国耻,一缕缕刀痕割出千百晚同胞的血泪,牢牢刻在中华民族的记忆深处。”《复兴之路》这段解说词中的“国耻“指的是( ) A.《南京条约》的签订 B.英法联军火烧圆明园 C.《马关条约》的签订 D.八国联军侵占北京 John _____ knowledge of radio just by staying around the radio station. A. caught on B. worked up C. took up D. picked up