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2014年成人高考专升本每日一练(10月7日)

2014年10月7日   来源:233网校 评论 我的做题记录
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1、回答题
    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 time it can save the land to hold garbage.For a long time, people buried garbage or dumped 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 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 the United 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.

What two problems can man solve by burning garbage?
A.The shortage of energy and air pollution.
B.The shortage of energy and the land to hold garbage.
C.Air pollution and the shortage of fossil fuel.
D.Air pollution and the shortage of land to hold garbage.


2、
A.2
B.1
C.1/2
D.0


3、 设函数y=f(x)的导函数yˊ= ƒˊ(x)的图像如图2-4—1所示,则下列结论肯定正确的是(  ).
A.x=-1是驻点,但不是极值点
B.名=-1不是驻点
C.x=-1为极小值点
D.x=-1为极大值点



填空题
4、


5、



简答题
6、 设函数y=αx3+bx+c在点x=1处取得极小值-1,且点(0,1)为该函数曲线的拐点,试求常数a,b,c.


7、绘画作品:《清明上河图》


8、简述智力技能的特点和形成阶段。


9、 对于培根的“学问锻炼天性,而其本身又受经验的锻炼”这句话我们应如何理解?

10、 简述形象思维的内涵及特征。


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