A-A+
If gold is marked with a Karat quality mark i
问题详情
If gold is marked with a Karat quality mark, it must also
A.bear a national gold and silver stamp.
B.bear the registered trademark of the entity standing behind the mark.
C.bear a "made in the USA" mark.
D.bear a percentage mark.请帮忙给出正确答案和分析,谢谢!
参考答案
正确答案:B