The purpose of environmental water retention areas is to slow down the permeation of water into the soil in order to reduce harmful chemicals reaching the ground water and water ways.

The normally Mr. Robrt has said little

I am friendly terms with her.

You should reflect how to solve that problem.

One of my pations was self-made man ① used to getting his way. A cynic, he never trusted his workers to do their jobs. He always double-checked them and this of ten led to conflict and angry outbursts. But he believed his temper gad contributed to his success. One autumn afternoon a motorist ② cut him off as he rushed from one job site to another. Ordinarily he would have poker ③ were being thrust into his chest. He barely managed to drive to the nearest hospital, ④ which he was admitted to the coronary-care unit.

A : Even though going out for two years, she and I are still not taking the same language.

B :

Scientists think the zebra evolved from a horselike animal with no stripes. They have different ideas about what the zebra's stripeless ancestor looked like, but many argue that it was mostly dark-colored or black. (So, to answer an old question, a zebra is probably a black animal with white stripes rather than the other way around,) the way stripes might have evolved is this: By accidental variation, some of the dark horse foals were born with lighter-colored stripes. Since stripes were protective coloring they were an advantage. And so striped animals often survived to have striped foals - another example of natural selection. More and more striped animals appeared as the generations passed. Eventually, there were several distint species of an animal we call the zebra.

Some anthropologist want to            the word 'race' as a classfication for human groups. Their first reason is the obious fact that human history has always involved migration and mobility, which results in interbreeding between different human groups. Therefore, there are no 'pure' races in the human species. Perhaps less well known is the fact that there exist several racial stocks, such as the African Bushman and the Polynesians of the South Pacific, that do not fit any one racial classification but have characteristics og several races. Finally although the average person may not be aware of it, and may even prefer to think otherwise, the greatest differences among human groups are not those of biology or race, but of culture.

The value of Philosopy is, in fact, to be sought largely in its very            . The man who has no tincture of philosophy goes throgh life imprisoned in the prejudices derived from common sense, from the habitual beliefs of his age or his nation, and from conviction which have grown up is his mind without the cooperation or consent of his deliberate reason. To such a man the world tends to become define, finite, obious; common objects rouse no questions, and unfamiliar possibilities are contemptously rejected. As soon as we begin to philosophize, on the contrary, we find, as we saw in our opening chapters, thar even the most everyday things lead to problems to which only very incomplete answers can be given.

The smoke signals from Asia's ailing cities are incteasingly obious, but many leaders and ordinary citizens are slow to act, for a relatively quick fix, governments can beef up enforcenment of existing regulations on     ㉠    , Levels-and later bring them in line with more stringent international standards. They can also require assessments of the environmental cost og schemes that increase commercial and privite traffic. A long-term regimen includes investing in more efficient and extensive mass transport systems and in alternative sources of clean energy; and committing to far-sighted urban planning that would help create jobs and housing   ㉡  congesred city center.

Another principle, that of conservation of energy, is the most recent of all. Energy can exist in a vast variety of forms, of which the simplest is pure energy of motion-the motion of a billiard ball over a table. Mewton had shown that this purely meshanical energy is 'conversed'.    ㉠   , when two billiard balls collide, the energy of each is changed, but the total energy of the two remains unaltered; one gives energy to the other, but no energy is lost og gained in the transection.   ㉡   , this is only true if the balls are 'perfectly elastic', an ideal condition in which the balls spring back from one another with the same speed with thich they approached.

Most musicians agree that the world's best violins were made in Cremona, Italy, about 300 years ago. These violins sound better than any others. They even sound better than violins made today, Violin makers and scientists now try to make instruments like the Italian violins, but they are not the same. Musicians still prefer the old ones. Why are there old Italian violins so special?          Some people think it is the age of the violins Other people say that the secret to those violins is the wood. Other people say that the kind of wood is not so important and that it is more important to cut the wood a special way.

Although many people think of reptiles as slimy, snakes and other reptiles are covered with scales that are dry to the touch. Scales are outgrowths of the animal's skin. Although in some species they are nearly invisible, in most they form a tile-like covering. The turtle's shell is made up hardened scales that are fused together. The crocodile has tough but more flexible covering.

Until the nineteenth century, when steamships and transcontinental trains made long-distance travel possible for large numbers of people, only a few adventurers, mainly sailors and traders, ever traveled out of their own countries, 'Abroad' was a truly foreign place about which the vast majority of people knew very little indeed. Early map makers therefore had little fear of being accused of mistakes, even though they were often wildly inaccurate as geographic reality. Nowhere is this more evident than in old maps illustrated with mythical creatures and strange humans.

If we don't protect Antarctica from tourism, there may be serious consequences for us all. The ice of Antarctica holds 70 percent of the world's fresh water. If this ice melts, ocean levels could rise 200 feat and flood the coastal cities of the Earth.

Also, the continent's vast fields of ice provide natural air conditioning for our planet. They keep Earth from getting too hot as they reflect sunlight back into space. Clearly, Antarctica should remain a place for careful and controlled scientific research. We cannot allow tourism to bring possible danger to the planet. The only way to protect this fragile and important part of the planet is to stop tourists from traveling to Antarctica.

A : Even though going out for two years, she and I are stil not tolking the same language.

B :                                .