【正文】 the universe, which includes millions of other galaxies and their stars and planets. By parison, the Earth is microscopic. Compared to a person, on the other hand, the Earth is enormous. It has a diameter of 7,926 miles (12,756 kilometers) at the equator, and it has a mass of about 61024 kilograms. The Earth orbits the Sun at a speed of about 66,638 miles per hour ( kilometers per second). Don39。s about 93 million miles away from us. The Sun39。s most visible contributions to life are light, heat and weather.Night and Day Some of the Sun39。s relationship with the Sun also creates seasons. The Earth39。re frozen. Most people are so used to the differences between night and day (or summer and winter) that they take them for granted. But these changes in light and temperature have an enormous impact on other systems on our planet. One is the circulation of air through our atmosphere. For example: The Sun shines brightly over the equator. The air gets very warm because the equator faces the Sun directly and because the ozone layer is thinner there. As the air warms, it begins to rise, creating a low pressure system. The higher it rises, the more the air cools. Water condenses as the air cools, creating clouds and rainfall. The air dries out as the rain falls. The result is warm, dry air, relatively high in our atmosphere. Because of the lower air pressure, air rushes toward the equator from the north and south. As it warms, it rises, pushing the dry air away to the north and the south. The dry air sinks as it cools, creating highpressure areas and deserts to the north and south of the equator. This is just one piece of how the Sun circulates air around the worldocean currents, weather patterns and other factors also play a part. But in general, air moves from highpressure to lowpressure areas, much the way that highpressure air rushes from the mouth of an inflated balloon when you let go. Heat also generally moves from the warmer equator to the cooler poles. Imagine a warm drink sitting on your deskthe air around the drink gets warmer as the drink gets colder. This happens on Earth on an enormous scale. The Coriolis Effect, a product of the Earth39。ve ever gotten out of a swimming pool on a hot day and realized a few minutes later that you were dry again, you have firsthand experience with evaporation. If you39。ve seen water form on the side of a cold drink, you39。ll go even though the movie is bad. [D] The man should count the number of people going。t tear either piece of cloth. [B] He wants part of each piece of cloth. [C] The pieces of cloth are made by a secret process. [D] The pieces of cloth seem identical to him.17. [A] Tuesday. [B] Wednesday. [C] Thursday. [D] Friday.18. [A] A photographer39。ve only put sunflower seeds into the covers so far. But we are working with plant (56) to find out which flowers would perform best. Maybe we could put roses in next time, said one scientist.[A] Recently [I] experts[B] consumers [J] forms[C] chemicals [K] bury[D] environment [L] paper[E] bine [M] scholar[F] transparent [N] plastic[G] buy [O] Usually[H] panionSection BDirections: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked [A], [B], [C] and [D]. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the center.Passage One It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the basis for the decisions we make, and the roots of our habits and skills are to be found in our past experiences, which are brought into the present by memory. Memory can be defined as the capacity to keep information available for later use. It not only includes remembering things like arithmetic or historical facts, but also involves any change in the way an animal typically behaves. Memory is involved when a rat gives up eating grain because he has sniffed (嗅出) something suspicious in the grain pile. Memory exists not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. It is interesting to pare the memory storage capacity of a puter with that of a human being. The instant access memory of a large puter may hold up to 100,000 wordsstring of alphabetic or numerical charactersready for instant use. An average . teenager probably recognizes the meaning of about 100,000 words of English. However, this is but a fraction of the total amount of information that the teenager has stored. Consider, for example, the number of faces and places that the teenager can recognize on sight. The use of words is the basis of the advanced problemsolving intelligence of human beings. A large part of a person39。s view about puters and human beings in terms of intelligence? [A] Computers have better memory than a child does. [B] Computers are as intelligent as a teenager is. [C] Computers can understand as many as 100,000 words. [D] Human beings are far superior to puters.60. What is the major characteristic of man39。s first duty will then be to his wife, and the wife39。s Pride and Prejudice will know that in former times marriage among wealthy families was arranged by the girl39。Family39。t giraffes have swollen feet? Giraffes should have (73) problem, too. Every time they bend heads (74) to drink, the blood should (75) to their heads and have a hard time (76) back up (when the head is down) to the heart. How e giraffes do