单选题下面谱例是高二选修课上学生演奏的分谱，其演奏乐器是()。

单选题个性心理特征包括()。

单选题在进化的过程中，鸟嘴形成了各种不同的形状，下图是鹦鹉、鹭鸶、老鹰和金丝雀头部的画像，从嘴型看，金丝雀应当是______A．B．C．D．

单选题Until a decade or two ago, the centers of many Western cities were emptying while their edges were spreading. This was not for the reasons normally cited. Neither the car nor the motorway caused suburban sprawl, although they sped it up: cities were spreading before either came along. Nor was the flight to the suburbs caused by racism. Whites fled inner-city neighborhoods that were becoming black, but they also fled ones that were not. Planning and zoning rules encouraged sprawl, as did tax breaks for home ownership—but cities spread regardless of these. The real cause was mass affluence. As people grew richer, they demanded more privacy and space. Only a few could afford that in city centers; the rest moved out. The same process is now occurring in the developing world, but much more quickly. The population density of metropolitan Beijing has collapsed since 1970, falling from 425 people per hectare to 65. Indian cities are following; Brazil's are ahead. And suburbanization has a long way to run. Beijing is now about as crowded as metropolitan Chicago was at its most closely packed, in the 1920s. Since then Chicago's density has fallen by almost three-quarters. This is welcome. Romantic notions of sociable, high-density living—notions pushed, for the most part, by people who themselves occupy rather spacious residences—ignore the squalor and lack of privacy to be found in Kinshasa, Mumbai or the other crowded cities of the poor world. Many of them are far too dense for dignified living, and need to spread out. The Western suburbs to which so many aspire are healthier than their detractors say. The modern Stepfords are no longer white monocultures, but that is progress. For every Ferguson there are many American suburbs that have quietly become black, Hispanic or Asian, or a blend of everyone. Picaresque accounts of decay overlook the fact that America's suburbs are half as criminal and a little more than half as poor as central cities. Even as urban centers revive, more Americans move from city centre to suburb than go the other way. But the West has also made mistakes, from which the rest of the world can learn. The first lesson is that suburban sprawl imposes costs on everyone. Suburbanites tend to use more roads and consume more carbon than urbanites(though perhaps not as much as distant commuters forced out by green belts). But this damage can be alleviated by a carbon tax, by toll roads and by charging for parking. Many cities in the emerging world have followed the foolish American practice of requiring property developers to provide a certain number of parking spaces for every building— something that makes commuting by car much more attractive than it would be otherwise. Scrapping them would give public transport a chance. The second is that it is foolish to try to stop the spread of suburbs. Green belts, the most effective method for doing this, push up property prices and encourage long-distance commuting. The cost of housing in London, already astronomical, went up by 19% in the past year, reflecting not just the city' s strong economy but also the impossibility of building on its edges. The insistence on big minimum lot sizes in some American suburbs and rural areas has much the same effect. Cities that try to prevent growth through green belts often end up weakening themselves, as Seoul has done. A wiser policy would be to plan for huge expansion. Acquire strips of land for roads and railways, and chunks for parks, before the city sprawls into them. New York's 19th-century governors decided where Central Park was going to go long before the city reached it. New York went on to develop in a way that they could not have imagined, but the park is still there. This is not the state control of the new-town planner—that confident soul who believes he knows where people will want to live and work, and how they will get from one to the other. It is the realism needed to manage the inevitable. A model of living that has broadly worked well in the West is spreading, adapting to local conditions as it goes. We should all look forward to the time when Chinese and Indian teenagers write sulky songs about the appalling dullness of suburbia.

单选题庄园是中世纪西欧农村基本的经济和社会组织，下列对庄园的表述不正确的是( )。

单选题下列成语中体现辩证否定观点是( )

单选题随着第二次工业革命的进行，主要资本主义国家的工业发生的最大变化是( )。

单选题下列节气中列在阴历十一月份的是()。

单选题我国未成年人保护工作应当遵循的原则不包括()。

单选题西藏自治区成立以来，历届人民代表大会常务委员会主任和人民政府主席都由藏族公民担任。全区干部队伍中，藏族及其他少数民族干部占82．05％，这支队伍带领西藏人民自主管理西藏地区事务。这表明( )。

单选题从______上看，思想政治课是以马列主义为核心的综合性的人文社会科学常识课。 A.课程目标来看 B.知识内容 C.活动方式 D.表现形式

单选题教师在布置课堂练习和家庭作业时，错误的做法是( )。

单选题某生物小组进行无土栽培实验，观察不同矿质元素对南瓜植株生长发育的影响。在4组单因素缺素培养实验中，他们观察到其中一组的表现为老叶形态、颜色正常，但幼叶颜色异常，呈黄白色。该组缺乏的元素是______。 A.K B.P C.Mg D.Fe

单选题关于全面发展的学生观的叙述不正确的是（　　）。

单选题《幼儿园工作规程》指出，幼儿园应制定合理的幼儿一日生活作息制度，两餐间隔时间不得少于()。

单选题执教《将进酒》，教师这样导入：余光中先生在他的一首题为《寻李白》的诗中这样写道“酒入豪肠，七分酿成了月光，余下的三分啸成剑气，秀口一吐就是半个盛唐。”(出示课件)李白一生诗酒相依，诗达意，酒传情，为我们留下了近千首脍炙人口的诗篇。请同学们回忆一下读过的李白诗中那些与酒相关的诗句。 对该教学导入的评价不正确的是______。 A.教师的导入语充满诗酒豪情，成功地把学生带入了诗境 B.让学生温故知新回忆学过的诗句，充分激发学习兴趣 C.导入中出示课件是画蛇添足，完全没有起到引导作用 D.导入语符合教材特点和学情，可顺利过渡到新课教学

单选题Eventually the government rebuilt the bridge______ the appeal and even pressure of the public.

单选题下列关于气体的制备的说法不正确的是______。 A.用碳酸钠粉末可以制备CO2 B.用铁片和稀H2SO4反应制取H2时，为加快产生H2的速率可改用浓H2SO4 C.加热分解NH4HCO3固体，将所得的气体进行适当处理可获得NH3 D.用KMnO4固体和用KClO3固体制O2的装置完全相同

单选题某寄宿制小学一位学生睡觉时突然小腿抽筋，生活老师应立即采取的措施是()。

单选题被称为“杂交水稻之父”是（　　）.