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-2

答案： C:《邶风 · 静女》
D:《郑风•溱洧》
答案: 【《郑风•溱洧》】...

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一个有n个节点、b条支路的电路，其基本回路矩阵的行数是[填空1]，列数是[填空2]；基本割集矩阵的行数是[填空3]，列数是[填空4]。

答案：第1空:b-n+1 第2空:b 第3空:n-1 第4空:b

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