The word 'demographers' (Line 1, Paragraph 7) most probably means ______.
A.people in favor of the trend of democracy
B.advocates of migration between states
C.scientists engaged in the study of population
D.conservatives clinging to old patterns of life

未分类题During the whole of a dull, dark and soundless day in the, autumn of the year, when the clouds hung oppressively low in the heavens, had been passing alone, on horseback, through a singularly dreary tract of country, and at length found myself, as the shades of the evening drew on, within view of the melancholy House of Usher. Thus Edgar Allan Poe opened his story of the fall of the House of Usher in 1839. In this beautifully crafted sentence he captured so much that is essential to the horror story: darkness, ominous solitude, foreboding calm, apprehension and uncertainty, and a deep feeling of melancholy that could soon turn to fear.Many kinds of fiction are self-explanatory: mysteries, Westerns, love stories, spy thrillers, and science fiction define themselves by the terms used to name them. The horror story is less easily defined, perhaps because other types of fiction so often use the trappings of terror to enhance their plots. Charles Dickens used the vehicle of an old-fashioned ghost story to tell A Christmas Carol, but that book is not a honor story. Nor does a Grimm brothers fairy tale such as Hansen and Grate with its child-devouring witch, belong to the genrE.The nature of the horror story is. best indicated by the title of the 1980s television series Tales from the Dark SidE.Human beings have always acknowledged that there is evil in the world and a dark side to human nature that cannot be explained except perhaps in religious terms. This evil may be imagined as having an almost unlimited power to inspire anxiety, fear, dread, and terror in addition to doing actual physical and mental harm.In the tale of horror quite ordinary people are confronted by something unknown and fearful, which can be neither understood nor explained in reasonable terms. It is the emphasis on the unreasonable that lies at the heart of horror stories. This kind of literature arose in the 18th century at the start of a movement called Romanticism. The movement was a reaction against a rational, orderly world in which humanity was basically good and everything could be explained scientifically. The literary type that inspired the horror story is Gothic fiction, tales of evil, often set in sinister medieval surroundings. This original kind of horror fiction has persisted to the present.In his novel, Edgar Allen Poe _______.A.integrated the description of beauty into his horror storyB.used a lot of typical descriptions of horror storiesC.was universally considered as the father of horror storyD.combined a touch of sadness in his description of horror

不定项选择人工智能是智能计算机系统，即人类智慧在机器上的模拟，或者说是人们使机器具有类似人的智慧（对语言能理解、能学习、能推理）

未分类题在窗体中使用一个文本框(名为n)接受输入的值，有一个命令按钮run，事件代码如下： Private Sub run_click( ) result ='' For i=1 TO Me! n For j=1 TO Me! n result = result+'*' Next j Result=result+Chr(13)+Chr(10) Next i MsgBox result End Sub 打开窗体后，如果通过文本框输入的值为4，单击命令按钮后输出的图形是( )。A.* * * * * * * * * * * * * * * *B.* * * * * * * * * * * * * * * *C.* * * * * * * * * * * * * * * * * * * * * * * * * * * *D.* * * * * * * * * * * * * * * *

单项选择题平衡变压器能将电力系统的三相电压变成相差（ ） 的两相电压。A. 1200B. 900C. 1800D. 600

多项选择题卫生法的基本特征是:A. 技术规范与法律规范紧密结合B. 调整手段的多样性C. 人类共同性D. 内容的广泛性

未分类题听力原文： American scientists are developing maps that can identify areas of future flooding. The ups also may help scientists estimate the possibility of extremely dry weather and severe storms.Tom Jackson of the United States Department of Agriculture pre pared the map after the April flooD.He used information provided by satellites in Earth orbit.The maps are produced from dish receivers on the satellites. Each dish receiver measures the wetness of the soil by capturing file natural release of microwave radiation from the soil. The receivers turn rapidly. This provides complete coverage of each area the satellite passes over.Mr. Jackson and other scientists have tested Aqua's equipment in airplanes mid satellites flying over several states. The scientists used the tests to develop ways to change the information gathered into maps.Mr. Jackson now plans to compare the microwave dish receiver findings with information from tests on Earth's soil. He will use instruments at Agricultural Research Service centers in four states. He aim will study infatuation provided by forty ground observation centers across the country.(30)A.To estimate the extreme weather.B.To develop the satellite technology.C.To improve agricultural output.D.To learn how to change information to maps more efficiently.

未分类题听力原文： Italy's capital Rome is a famous tourist attraction, hut there are swarms of birds that crowd in Rome's historic public squares and churches every winter, reining tourists and passers-by to seek refuge under umbrellas. Recently, scientists have found out a good way to mire this problem. The Italian League for the Protection of Birds will broadcast bird 'distress calls' over loudspeakers in the historic centers, using a technology it has tried in Rome's outskirts to scum the birds away. The scientists have recorded the sound that these birds make when there is danger and they will play it over megaphones at dusk when the birds are starting to nest down. They want to chase the birds out of concentrated urban centers with distress calls and spot lights. Then the birds will head to outlying parks mid suburbs. This method has been proved very efficient and there is no cruelty to birds involved since they just migrate to parks and woods outside the city. Between October and February some four million birds migrate to the Italian capital al from Germany, Poland and Russia, darkening the horizon and painting abstract shapes in file sky that capture the imagination of onlookers. The huge flocks also coat ears, buildings and any one who has not found cover with bird droppings. Tourists are advised to carry umbrellas or raincoats at dusk and residents have to put up with the terrible smell for months ate timE.(33)A.Begging food from the tourists.B.Attacking the tourists.C.Dropping wastes on the tourists.D.Making loud noise to disturb the tourists.

未分类题The phrase 'once in a blue moon' in last line refers to ______.A.all at onceB.once for a long timeC.once in a whileD.once and for all

未分类题According to the context, the sentence 'But young actors with the stage in their blood are happy' at the end of the first paragraph means ______.A.they don't care if their job is hardB.they like the stage naturallyC.they are born happyD.they are easily satisfied

单项选择题The description is composed by two parts: the overview and _______. A、 questions B、 comparison C、 detailed data D、 contrast