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【简答题】
某企业共有5个投资方案，它们的期初成本和净现值估计如下： 期初成本(元) 净现值 方案 A B C D E 100 200 100 300 100 30 -10 35 45 20 (1)如果企业使用资金可以不受限制，它应采用哪些方案?为什么? (2)如果企业使用资金最多不能超过300元，它应采用哪些方案?为什么?
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举一反三
【单选题】It can be inferred from the passage that the author ______.
A.
is in favor of prohibiting passengers' use of electronic devices completely
B.
regards it as unreasonable to exercise a total ban during flight
C.
hasn't formed his own opinion on this problem
D.
has overestimated the danger of electromagnetic interference
【单选题】In the angry debate over how much of IQ comes from the genes that children inherit from parents and how much comes from experiences, one little fact gets overlooked: no one has identified any genes (o...
A.
scientists have reached an agreement
B.
scientists' opinions vary
C.
no genes have ever been identified
D.
scientists have found many smart genes
【简答题】密码学的发展历程可以分成三个阶段: 、 和现代密码。
【简答题】执行如下代码,则程序的运行结果是 。year=eval(input("输入年份："))#也可用int()函数if(year%4==0andyear%100!=0)or(year%400==0):print("闰年")else:print("非闰年")当运行时输入1900时，程序运行结果如何？
【简答题】Through life learning, children _______ . [ A] will grow without the assistance from parents [ B] will learn to communicate with the real world [ C] will be driven to learn necessary life knowledge [ ...
【单选题】It can be inferred from the passage that the author ______.
A.
is in favor of prohibiting passengers' use of electronic devices completely
B.
has overestimated the danger of electronic devices completely
C.
hasn't formed his own opinion on this problem
D.
regards it as unreasonable to exercise a total ban during flight
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