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项目经理小李对某活动工期进行估算时，发现人员的熟练程度和设备供应是否及时对工期至关重要。如果形成最有利组合时，预计9天可以完成；如果形成最不利组合时，预计23天可以完成；按照公司的正常情况，一般13天可以完成。该项目的工期可估算为（）天。
A．12
B．13
C．14
D．15
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第75题
Modern computers based on （ ） are millions to billions of times more capable than the early computers, which occupy a fraction of the space. Simple computers are small enough to fit into mobile devices, an mobile computers can be powered by small batteries. Personal computers in their various forms are icons of the Information Age and are what most people think of as ‘computers’.
A、Central Processing Unit
B、integrated circuits
C、Hard disk
D、software integr答案解析与讨论：https://www.ruantiku.com/shiti/65282248.html