某企业为机器设备投保,实际完好价值是20万元,保险金额为15万元,绝对免赔率5%。当约定事故发生后,设备损失10万元,请问保险公司应该赔偿多少金额?
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工厂里有一个记录职工每天日产量的关系模式:R(职工编号,日期,日产量,车间编号,车间主任)1.如果规定:每个职工每天只有一个日产量;2.每个职工只能隶属于一个车间;3.每个车间只有一个车间主任。试写出该关系模式非主属性对码的函数依赖关系,分析是否存在部分函数依赖和传递函数依赖?
I am Mike Wang, a real estate agent. I ___1___ to sell this home in just 15 days. I would love to help you buy or sell. Properties in this area are _______2______. If you have considered selling your home, I would love to speak with you and help you in any way ___3_____. If you are currently renting a home and would like to buy one, give me a call. Home ownership has many ____4_____ over renting and is not as difficult as many think. Call me today and let me help you make _______5__________.
1. We promise (give)_________ you a reply within five work days.2. The bank loan has (great)________ strengthened our financial position in the industry.3.Photography has changed our way of (view) __________ the world.4. That new model of the machine is not likely to go into (produce)___________ before late 2018.5.Anyone applying for a visa to China (require) _________ to have finger prints taken.
存在非主属性对码的部分函数依赖是
A. 1NF
B. 2NF
C. 3NF
D. 4NF