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15.商品的二因素指的是( )
A
A.使用价值和剩余价值 B.使用价值和交换价值 C.价值和使用价值 D.价值和交换价值
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C
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12.在人类社会发展中起决定作用的因素是
13.阶级斗争在阶级社会发展中的作用表现为,它是阶级社会发展的( )
试述内容和形式关系的原理及其意义。
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产业资本循环中为生产剩余价值准备条件的阶段是( )
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5.下列功能中,不属于企业资源规划(ERP)系统实现的是
2.
23.How can we get rid of garbage? Do we have enough energy sources to meet our future energy needs? These are two important questions that many people are asking today. Some people think that man might be able to solve both problems at the same time.They suggest using garbage as an energy source,and at the some time it can save the land to hold garbage. For a long time, people buried garbage or dumped (倾倒) it on empty land. Now, empty land is scarce.But more and more garbage is produced each year.However, garbage can be a good fuel to use.The things in garbage do not look like coal, petroleum, or natural gas;but they are chemically similar to these fossil(化石) fuels.As we use up our fossil fuel supplies, we might be able to use garbage as an energy source. Burning garbage is not a new idea.Some cities in Europe and theUnited States, have been burning garbage for years.The heat that is produced by burning garbage is used to boil water.The steam that is produced is used to make electricity or to heat nearby buildings. In Paris France, some power plants burn almost 2 million metric tons of the cities garbage each year.The amount of energy produced is about the same as would be produced by burning almost a half million barrels of oil. Our fossil fuel supplies are limited. Burning garbage might be one kind of energy source that we can use to help meet our energy needs.This method could also reduce the amount of garbage piling up on the earth.23.1 What two problems can man solve by burning garbage?A.The shortage of energy and air pollutionB.The shortage of energy and the land to hold garbageC.Air pollution and the shortage of fossil fuelD.Air pollution and the shortage of land to hold garbage
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以太网交换机,其实质是一种多端口网桥,它工作在OSI七层参考模型的
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本质上是对“解放理性”的追求的是()
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30.有限责任公司
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