The two men are well ______ with each other since they once studied in the same university.

Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots. Unlike most of the world's volcanoes, they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of them lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The hot spots and their volcanic trails are milestones that mark the passage of the plates. That the plates are moving is not beyond dispute. Africa and South America, for example, are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots, anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an analysis of the hot spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years. The significance of hot spots is not confined to their role as a frame of reference. It now appears that they also have an important influence on the geophysical processes that propel the plates across the globe. When a continental plate come to rest over a hot spot, the material rising from deeper layer creates a broad dome. As the dome grows, it develops seed fissures (cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hot spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability (inconstant). The author believes that ______.

Students who get very high marks will be ______ from the final examination.

What is the______in going by boat when the plane costs no more and is quicker?

What are those of us who have chosen careers in science and engineering able to do about our current problems? First, we can help destroy the false impression that science and engineering have caused the current world trouble. On the contrary, science and engineering have made vast contributions to better living for more people. Second, we can identify the many areas in which science and technology, more considerably used, can be of great service in the future than in the past to improve the quality of life. While we can make many speeches, and pass many laws, the quality of our environment will be improved only through better knowledge and better application of that knowledge. Third, we can recognize that much of the dissatisfaction we suffer today results from our very successes of former years. We have been so greatly successful in attaining material goals that we are deeply dissatisfied that we cannot attain other goals more rapidly. We have achieved a better life for most people, but we are unhappy that we have not spread it to all people. We have reduced many sources of environmental disasters, but we are unhappy that we have not conquered all of them. It is our raised expectations rather than our failures which now cause our distress. Granted that many of our current problems must be cured more by social, political, and economic instruments than science and technology, yet science and technology must still be the tools to make further advances in such things as clean air, clean water, better transportation, better medical care, more adequate welfare programs, purer food, conservation resources, and many other areas. The author thinks that science and technology ______.

Most of the waiters are______in their work because the owner of the restaurant does not pay them on time.

______ that the pilot couldn't fly through it.

The Japanese desire for marriage had been very strong. In the fifth ""world youth attitude survey""【C1】______by the Management and Coordination Agency in 1993, over 70 percent of the Japanese【C2】______chose the answers ""One should get married. "" or ""It's better to get married. "" Of the 11 countries surveyed, Japan was【C3】______only by the Philippines in the percentage advocating marriage【C4】______opposed to a single life. In recent years, however, there has been a spreading recognition among the Japanese public that something【C5】______is happening in people's attitudes toward marriage. When they began to have adequate food, clothing and shelter and thus became able to【C6】______their attention to other matters, the Japanese for the first time【C7】______a renewed look at the question of marriage. In the 1990s, people began to ask ""What on earth is marriage anyway?"" and to talk about marriage itself. In Japan, the proportion of men still unmarried in their thirties reached about 20 percent in the national census taken in 1985 and the【C8】______apparently exceeded 30 percent in 1995. The proportion of unmarried women in the 25-29 age bracket has been increasing【C9】______about 5 percent every five years until it is now nearly 50 percent. What are the real reasons women choose not to marry? Early on, two were【C10】______: women were now better educated and more women were interested in working outside the home. Many women have become【C11】______independent, acquiring enough self-confidence to【C12】______a meaningful life outside of marriage. And【C13】______seems to be a wide gap in the way men and women view marriage. Women generally believe that,【C14】______women's roles in Japan's postwar society have become diversified, men have essentially remained unchanged.【C15】______such circumstances, communication between the sexes is, in fact, far from easy. Besides that, in the postwar Japan, individualism has begun to take 16 . The 50 years since the end of the war are regarded as process of a【C17】______from the family-centered to the individual-centered way of thinking. In Japan today, society has matured to a point【C18】______it now tolerates a diversity of marriage styles which were unthinkable not very long ago. In the future, such tolerance is almost【C19】______1:0 increase. But a headlong plunge toward unbridled individualism is also dangerous. The ideal【C20】______may be to achieve a complementary fusion of the collectivism of Japan's traditional community and the individualism of the new age."

em>Directions:/em> You are asked to write an essay on the following topic: em>Universi

You should ______ to one or more weekly magazines such as em>Time, or Newsweek/em>.

When the report was published

Because a circle has no beginning or end, the wedding ring is a symbol of______ love.

His account of his experience in Antarctic cannot be dismissed as ______.

The forest ranger cautioned the hikers that their proposed route might prove dangerous, but they ignored her ______.

Smell is the most direct of all the senses

In order to be more productive and efficient

If the world is to remain peaceful

As children get older

Anesthetics are substances______to deaden pain or produce a condition in which some or all of the senses, especially touch, stop functioning or are reduced.

The current emergency in Mexico City that has taken over our lives is nothing. I could ever have imagined for me or my children. We are living in an environmental crisis, an air-pollution emergency of unprecedented severity. What it really means is that just to breathe here is to play a dangerous game with your health. As parents, what terrorizes us most is reports that children are at higher risk because they breathe more times per minute. What more can we do to protect them and ourselves? Our pediatrician's (儿科医师的) medical recommendation was simple: abandon the city permanently. We are foreigners and we are among the small minority that can afford to leave. We are here because of my husband's work. We are fascinated by Mexico—its history and rich culture. We know that for us, this is a temporary danger. However, we cannot stand for much longer the fear we feel for our boys. We cannot stop them from breathing. But for millions, there is no choice. Their lives, their jobs, their futures depend on being here. Thousands of Mexicans arrive each day in this city, desperate for economic opportunities. Thousands more are born here each day. Entire families work in the streets and practically live there. It is a familiar sight: as parents hawk goods at stoplights, their children play in the grassy highway dividers, breathing exhaust fumes. I feel guilty complaining about my personal situation. We won't be here long enough for our children to form the impression that skies are colored only gray. And yet the government cannot do what it must to end this problem. For any country, especially a developing Third World economy like Mexico, the idea of barring from the capital city enough cars, closing enough factories and spending the necessary billions on public transportation is simply not an option. So when things get bad, as in the current emergency, Mexico takes half measures—prohibiting some more cars from circulating, stopping some factories from producing—that even its own officials concede aren't adequate. The word "emergency" implies the unusual. But when daily life itself is an emergency, the concept loses its meaning. It is human nature to try to adapt to that which we cannot change. Or to mislead ourselves into believing we can adapt. According to the passage, the current emergency in Mexico City refers to ______.