多项选择题

Why did many online merchants failed to achieve profit?

A．lowered prices below the total costs
B．spent too little on marketing.
C．failed to develop efficient business processes
D．failed to attract a large enough audience to their Web sites

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问答题

诗经爱情诗十二讲2023章节测试答案_诗经爱情诗十二讲智慧树知到答案-1

答案：第一章单元测试
1、单选题：
《诗》收集西周初年到春秋中叶约（）年的诗歌作品。
A:四百

单项选择题

最初的电子游戏是运行在红白机上的。

A．对
B．错