____________________ sell products to the public.____________________ often change each month.
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________ is a money-making division within a company.________ is the revenue per product after variable expenses.
The total number of products sold is called_____________________________________________ .Revenue minus fixed and variable expeses is_____________________________________________ .
1949年长沙陈家大山楚墓出土的《人物龙凤帛画》和1973年长沙子弹库1号楚墓出土的《人物御龙帛画》是目前所知最重要的两幅什么时期绘画作品?
甲骨文为中国最古老的篆书文字。
A. 对
B. 错