19. Customers can refuse (accept) _________ the goods where it has adoubt about their origin.
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20. The bright and (comfort) ___________room has a large living room withseparated sleeping area, kitchen and bathroom.
发现相对论的人是爱因斯坦。()
A. 对
B. 错
AA级绿色食品标志与字体为绿色,底色为白色,A级绿色食品标志与字体为白色,底色为绿色。
A. 对
B. 错