Once a year, on the ________day of the full moon, Hou Yi visits his wife. That is why the moon is full and beautiful on that night.()

Huanjing stood outside the door waiting for the senior for ________ days.()

A、five
B、three
C、four
D、two

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某公司需购买设备，现有一方案，第一年投资1900万元，投资后每年净收益320万元，项目寿命期为10年。计算其静态投资回收期、内部收益率并解释其经济意义。 点击查看答案