单选题Faster Effective Reading A higher reading rate, with no loss of comprehension, will help you in other subjects as well as in English, and the general principles apply to any language. Naturally, you will not read every book at the same speed. You would expect to read a newspaper, for example, much more rapidly than a physics or economics textbookbut you can raise your average reading speed over the whole range of materials you wish to cover so that the percentage (百分比) gained will be the same whatever kind of reading you are concerned with. The reading passages which follow are all of an average level of difficulty for your stage of instruction. They are all about five hundred words long. They are about topics of general interest which do not require a great deal of specialized knowledge. Thus they fall between the kind of reading you might find in your textbooks and the much less demanding kind you will find in a newspaper or light novel. If you read this kind of English, with understanding at, say, four hundred words per minute, you might drop to two hundred or two hundred and fifty. Perhaps you would like to know what reading speeds are common among native Englishspeaking university students and how those speeds can be improved. Tests in Minnesota, U. S. A, for example, have shown that students without special training can read English of average difficulty, for example, Tolstoy's War and Peace in translation, at speeds of between 240 and 250 words per minute with about seventy percent comprehension. Students in Minnesota claim that after twelve halfhour lessons, once a week, the reading speed can be increased, with no loss of comprehension, to around five hundred words per minute.

单选题An example of the endangered species that people often talk is the panda.A. worriedB. neglectedC. reducedD. mentioned

单选题These factors interact intimately and cannot be separated.

单选题Recycling Around the World Recycling is one of the best environmental success stories of the late 20th century. But we could do more. People must not see recycling .as fashionable, but essential. The Japanese are very good at recycling because they live in a crowded country. They do not have much space. They do not want to share their limited space with rubbish. But even so, Tokyo area alone is estimated to have three million tons of leftover rubbish at present. In 1996, the United States recycled and composted (制成肥料)57 million tons of waste (27% of the nation's solid waste). This is 57 million tons of waste which did not go into landfills and incinerators (焚化炉). In doing this, 7,000 rubbish collection programmes and recycling centres helped the authorities. In Rockford, a city in Illinois, US, its officials choose one house each week and check its garbage (废物). If the garbage does not contain any newspapers or aluminium (铝) cans, then the resident of the house gets a prize of at least $1,000. In Japan, certain cities give children weekly supplies of tissue paper and toilet paper in exchange for a weekly collection of newspapers. In one year Britain recycles: · 1 out of every 3 newspapers. · 1 out of every 4 glass bottles and jars (罐子). · 1 out of every 4 items of clothing. · 1 out of every 3 aluminium drink cans. In 1999, Hong Kong transported 1.3 million tons of waste to mainland China for recycling. Around 535,000 tons of waste were recycled in Hong Kong itself. Over half the things we throw away could be recycled. That means we could recycle 10 times as much as we do now. However, recycling needs a lot of organisation and special equipment. Also, there is not much use for some recycled material.

单选题The system is designed to be used in conjunction with a word processing program.

单选题Benjamin Franklin was not the first to {{U}}suggest{{/U}} the relationship between lightning and electricity, but his experiment with a kite was original.

单选题Which of the following does NOT fit the definition of the black hole?

单选题Many scientists have been probing psychological problems.

单选题Did anyone Ucall/U me when I was out?

单选题My piano playing has improved {{U}}significantly{{/U}} since I had a new teacher.

单选题Because of the popularity of the region, it is {{U}}advisable{{/U}} to book hotels in advance. A. possible B. profitable C. easy D. wise

单选题Fortified medieval towns were often {{U}}surrounded{{/U}} by two water moats.

单选题{{B}}第三篇{{/B}} Archaeology has long been an accepted tool for studying prehistoric cultures. Relatively recently the same techniques have been systematically applied to studies of the more immediate past. This has been called "historical archaeology", a term that is used in the United States to refer to any archaeological investigation into North American sites that postdate the arrival of Europeans. Back in the 1930's and 1940's, when building restoration was popular, historical archaeology was primarily a tool of architectural reconstruction. The role of archaeologists was to find the foundations of historic buildings and then take a back seat to architects. The mania for reconstruction had largely subsided by the 1950's and 1960's. Most people entering historical archaeology during this period came out of university anthropology departments where they had studied prehistoric cultures. They were, by training, social scientists, not historians, and their work tended to reflect this bias. The questions they framed and the techniques they used were designed to help them understand, as scientists, how people behaved. But because they were treading(踩,踏) on historical ground for which there was often extensive written documentation and because their own knowledge of these periods was usually limited, their contributions to American history remained circumscribed. Their reports, highly technical and sometimes poorly written, went unread. More recently, professional archaeologists have taken over. These researchers have sought to demonstrate that their work can be a valuable tool not only of science but also of history, providing fresh insights into the daily lives of ordinary people whose existences might nt otherwise be so well documented. This newer emphasis on archaeology as social history has shown great promise, and indeed work done in this area has led to a reinterpretation of the United States' past. In Kingston, New York, for example, evidence has been uncovered that indicates that English goods were being smuggled into that city at a time when the Dutch supposedly controlled trading in the area. And in Sacramento an excavation at the site of a fashionable nineteenth-century hotel revealed that garbage had been stashed(存放) in the building' s basement despite sanitation laws to the contrary.

单选题It was Uobvious/U that she was not going home.

单选题Photojournalist Margaret Bourke-White became famous for her {{U}}coverage{{/U}} of significant events during the Second World War.

单选题Dumped waste might Ucontaminate/U water supplies.

单选题Hurricane (飓风) Katrina A．hurricane is a fiercely powerful, rotating (旋转的) form of tropical storm that can be 124 to 1, 240 miles in diameter. The term hurricane is derived from Hurican, the name of a native American storm god. Hurricanes are typical of a calm central region of low pressure between 12 to 60 miles in diameter, known as the eye. They occur in tropical regions. Over its lifetime, one of these storms can release as much energy as 10,000 nuclear bombs. The seed for hurricane formation is a cluster (聚焦) of thunderstorms over warm tropical waters. Hurricanes can only form and be fed when the sea-surface temperature exceeds 27℃ and the surrounding atmosphere is calm. These requirements are met between June and November in the northern part of the world. Under these conditions, large quantities of water evaporate (蒸发) and condense (冷凝) into clouds and rain-releasing heat in the process. It is this heat energy, combined with the rotation of the Earth, that drives a hurricane. When the warm column of air from the sea surface first begins to rise, it causes an area of low pressure. This in turn creates wind as air is drawn into the area. This spinning wind drags up more moist air from the sea surface in a process that strengthens the storm. Cold air falls back to the ocean surface through the eye and on the outside of the storm. Initially, when wind speeds reach 23 miles per hour, these mild, wet and grey weather systems are known as depressions, or low air pressure. Hurricane Katrina formed in this way over the south-eastern Bahamas on 23 August 2005. Katrina has had a devastating impact on the Gulf Coast of the US, leaving a disaster zone of 90,000 square miles in its wake (尾迹)—almost the size of the UK. Thousands have been killed or injured and more than half a million people have become homeless in a humanitarian (人道主义的) crisis of a scale not seen in the US since the Great Depression. The cost of the damage may top $100 billion.

单选题Most animal fats are saturated, containing more hydrogen than carbon, and do not spoil as easily as unsaturated fats.

单选题This kind of material was seldom used in building houses during the middle ages.

单选题The young man was accused of theft in the supermarket.A. arrested forB. charged withC. praised forD. described as