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【单选题】
某投资方案的初期投资额为2000万元,伺候每年年末的净现金流量为400万元,若基准收益率为15%,方案的经济寿命为15年,则该方案的净现值为()万元。(P/A,15%,15)=5.8474A.
300
B.
339
C.
359
D.
360
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【单选题】7假设x =((1,2),(3,4,5),(5,6,5,9)),len(x)和len(x [0])?
A.
2和1
B.
2和2
C.
3和2
D.
2和3
E.
3和3
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