There was an ________ (exhibit) of old photographs about the city in Shanghai Musum last month.
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It took him three hours to find out a _______ (solute) to the problem.
Thank you for your ______ (participate) in our survey.
出土红山文化玉器的遗址有哪些( )
A. 辽宁建平牛河梁遗址
B. 辽宁阜新胡头沟遗址
C. 赤峰市二道井子遗址
D. 赤峰市敖汉旗南台子遗址
下列哪几项属于红山文化的典型玉器( )
A. 玉琮
B. “C”型玉龙
C. 斜口筒形器
D. 勾云形玉器