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Examinations Exert a Negative Influence on Education
We might marvel at the progress made in every field of study,but the methods of testing a person's knowledge and ability remain as primitive as ever they were. It really is extraordinary that aAmerican black bears
American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these brown, red, or even yellow coats. To the north, the black bear is actually gStatistics
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states and statCohesion-tension Theory
Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the groundThe source of Energy
A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy thObtaining Fresh water from icebergs
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now itRaising Oysters
In the oysters were raised in much the same way as dirt farmers raised tomatoes- by transplanting them. First, farmers selected the oyster bed, cleared the bottom of old shells and other debris, thPlate Tectonics and Sea-floor Spreading
The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle. The lithosphe逆境有助于孩子的成长
Hard life is good for childrenIn china, with the enforcement(强制) of the birth control policy, most parents have only one child. The parents and grandparents have shown too much love to their only cGood Writing, Bad Writing ?(好文章，坏文章?)
Good Writing, Bad Writing ? Despite the modern desire to be easy and casual, Americans from time to time give thought to the language they use, to grammar, vocabulary,and official languagesThings about Me
I am Andrea. Perhaps the word "average" can best describe me. I am of average height, average weight and of average complexion. I have a thin face, double-lid eyes and a pointed nose. My一生的事业
As food is to the body, so is learning to the mind. Our bodies grow and muscles develop with the intake of adequate nutritious food. Likewise, we should keep learning day by day to maintain our keeBacteria
Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead isSleep
Sleet is part of a person's daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your sleep cycle is as follows. WhenTwo Attitudes Toward Part-time Jobs
A serious problem has arisen in recent several years that more and more college students abandon study because of their taking part-time jobs, so quite a few people are opposed to part-time jobs. H