题目内容
Before the 1500’s, the western plains of North America were dominated by farmers. One group, the Mandans, (31) in the upper Missouri River country, primarily in present-day North Dakota. They had large villages of houses (32) close together. The (33) arrangement enabled the Mandans to protect themselves more easily (34) the attacks of others who might seek to (35) some of the food these highly capable farmers stored from one year to the next. The women had primary responsibility for the fields. They had to exercise (36) skill to produce the desired results, (37) their northern location meant fleeting growing seasons. Winter often lingered; autumn could (38) by severe frost. For good measure, during the spring and summer, drought, heat, hail, grasshoppers, and other (39) might await the wary grower. Under (40) conditions, Mandan women had to grow maize capable of weathering (41) They began (42) it appeared feasible to do so in the spring. Harvesting proceeded in (43) stages. In August the Mandans picked a small amount of the crop (44) it had matured fully. This green corn was boiled, dried, and shelled, with some of the maize (45) for immediate consumption and the reststored in (46) bags. Later in the fall, the people picked the rest of the corn. They saved the best of the harvest for seeds or for trade, (47) the remainder eaten right away or stored for later use in underground reserves. With appropriate (48) of the extra food, the Mandans protected themselves (49) the disaster of crop failure and accompanying (50) .
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Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich, England, is numbered zero. The earth is divided into 360 degrees, and the meridians are numbered east and west from Greenwich. There are 180 degrees of longitude east of Greenwich and 180 degrees in the westerly direction. New York has a longitude of 74 degrees west (74oW.) which means that it lies on the 74th meridian west of Greenwich. Since the sun appears to travel around the earth in 24 hours, it will move 360/24 or 15 degrees in one hour. This reasoning can be used by navigators to determine their longitude. Imagine that we have set sail from Greenwich, England, after having set a very accurate clock, or chronometer, to the local Greenwich time. As we travel westward toward New York, we notice that the sun is going "slower" than our chronometer. At the time that our timepiece reads 12 o’clock, the sun has not quite reached the zenith. As a matter of fact, when our clock reads noon, what it really means is that it’s noon in Greenwich, England. Our clock continues to tell us the time, not at our present location, but at Greenwich. Let us wait until the sun is directly overhead (noon at our location) and then read the time on our clock. Suppose it reads i o’clock. This means that there is one hours difference in time between our longitude and that of Greenwich. As we mentioned earlier, this corresponds to exactly 15 degrees of longitude, so our longitude must be 150 W. The world is divided into 24 time zones, and each zone corresponds to 15 degrees of longitude. New York is approximately 5 time zones west of Greenwich, so the time difference must be about 5 hours. By maintaining chronometers on Greenwich time, ships can determine their longitude on any sunny day by merely noting the difference in hours between Greenwich time and local sun time and multiplying this difference by 15 degrees. Of course, longitude gives only half of the information needed to determine our precise location. We must also know our latitude, which tells us how far we are north or south of the Equator. The Equator is the zero line for the measurement of latitude. Circles are drawn parallel to the Equator to indicate other values of latitude. There are 90 degrees of south latitude. In the Northern Hemisphere there is a star called Polaris almost directly over the North Pole. This makes it possible to determine the latitude of a given point by setting our sextant (六分仪) to measure the angle between Polaris；the North Star, and the horizon. Mathematicians tell us that this angle is equal to the latitude at the point in question. To get idea of our location, therefore, we need to know local time, Greenwich time, and the angle between Polaris and the horizon. A navigator’s chronometer will always show _____________.
某小家用电器生产企业只生产家用多功能食品粉碎机一种产品，其总成本习性模型为Y=1000000+300X。假定该企业2011年度家用多功能食品粉碎机销售量为10000台，每台售价为500元。经预测2012年对该种家用多功能食品粉碎机销售数量可以增长10%。 如果2011年发生负债利息为500000元，且企业没有优先股，计算复合杠杆系数。
A企业为生产应税消费品的企业，2008年的含税销售收入为936万元，销售利润率为15%，适用的增值税税率为17%，材料成本占总成本的百分比为65%，假定该企业生产所使用的材料都是在当期内采购的，适用的消费税税率为5%，城市维护建设税税率为7%，教育费附加的征收率为3%，发生的各项应交税金及附加均于当期以现金形式支付。2009年A企业预计的含税销售收入为1170万元，预交所得税40万元。 计算2009年预计发生的销售税金及附加。
What do you do if you don’t get into your first choice of university That’s the dilemma that faces thousands of British students every year. Many candidates turn to Clearing, the service that helps find university places for students at the last moment. If they don’t have the marks to get into their first choice of institution, Clearing tells them about places available at other universities, though they might have to read another subject. But this year has seen a record number of people applying to university. This, combined with the weak economy, an uncertain job market and budget cuts at universities, means that there’s been even more of a scramble for places than usual. Some sources say six students have applied for each remaining undergraduate university place. The British university admissions service, UCAS, says up to a quarter of this year’s university applicants—almost 190,000 people—still don’t have a place on a degree course. That’s a rise of over 46,000 students from last year. Faced with these figures, some British students might be thinking of an interesting alternative: studying abroad. The University of Nottingham, for example, is offering places at its campuses in Ningbo, near Shanghai, and Kuala Lumpur, Malaysia. Students here can gain University of Nottingham degrees in business, accounting, engineering and English. Similarly, the University of Bolton says it has "unlimited" places at its campus in the United Arab Emirates. Given the problems getting into university, the UK’s Higher Education Minister, David Willetts, encourages students who haven’t made the grade to consider alternatives to university, such as apprenticeships and studying at home. "There are a range of options available," he says. "People are able to reapply. They should think how they can spend their year adding that bit to their CV, which would help their application—getting practical work experience or extra skills—anything that strengthens their chances next year." But some commentators say that rising university costs, poor long-term job prospects, and a drop in graduate recruitment mean it’s the worst time to be a university student in the UK. It is implied in the passage that______.
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