单选题两个或两个以上的个人或组织将原来一个人或组织生产活动中所包含的不同职能的操作分开进行的活动称为( )。A．专业化B．合作C．专业生产D．分工

单选题长时问看电脑，我的眼睛不会觉得酸疼。 A．是 B．否

单选题如果一切照现在这个样子继续下去，人们很难期望会发生什么了不起的事。

单选题衡量产业的关联效应的指标除了影响力系数外，还有( )。A．生产诱发系数B．间接消耗系数C．最终依赖度D．感应度系数

单选题在一起行政强制执行案件中，执行人员要拆除江某修建的被行政机关认为违章的建筑。江某即跑到现场，扬言要是把违章建筑拆了，她就喝毒药。执行人员不予理会，将该建筑拆除。江某当一气之下喝下一瓶农药，经抢救无效死亡。后来有关机关认定，该建筑并非违章建筑。江某之子要求行政机关对江某的死亡承担赔偿责任。下列说法正确的是（ ）。

单选题实现不同的作业处理方式(如批处理、分时处理、实时处理等)，主要是基于操作系统对______管理采用了不同的策略。 A.处理机 B.存储 C.设备 D.文件

单选题我们用少数几种符号就可以综合地反映信息在系统中的流动、处理和存储情况，清楚地看到全面的系统逻辑模型。描述系统逻辑模型的重要工具是( )。A．E-R模型和数据字典B．数据处理功能分析表C．E-R模型和数据流程图D．数据字典和数据流程图

单选题可持续发展要求我们在三个方面协调统一发展，这三个方面是( )。A．政治、经济和文化B．经济、社会和环境C．经济、文化和环境D．经济、社会和文化

单选题假设某袋中共有9个球，4个白球，5个黑球。现从中任取两个，两个球中，一个是白球，另一个是黑球的概率为（）。

单选题下列成立自首的是（ ）

单选题下列关于营运资金周转的说法正确的是______。A．营运资金周转是指企业的营运资金从应收账款开始，到最终转化为现金为止的过程B．存货周转期，是指将原材料转化成产成品并出售所需要的时间C．营运资金的周转通常与现金周转无关D．存货周转期、应付账款周转期和应收账款周转期越短，营运资金数额就越小

单选题当我必须短期离家出门的时候，我会感到心神不宁。

单选题甲开车将乙撞伤，乙随身携带的笔记本电脑也被损坏。乙诉至法院要求甲赔偿其经济损失1万元。在本案诉讼中的证据包括：(1)乙拍摄的反映身上伤痕的照片；(2)被撞坏的电脑一台；(3)邻居何某证明乙与甲关系一直不和；(4)医院证明乙因治疗花费5000元。下列对于证据的界定正确的是( )。A．证据(1)属于原始证据B．证据(2)属于本证C．证据(3)属于直接证据D．证据(4)属于间接证据

单选题赵亮系某大学大三学生，一日与同学到学校附近某餐馆吃饭，餐后赵亮和另外两位同学感到腹部不适，并腹泻、呕吐。经查，该餐馆使用的是地沟油。于是，赵亮在某网站的社区论坛上发帖，讲述了上述经历，并号召大家不要去该餐馆吃饭，该餐馆的生意因而大受影响。赵亮的行为属于______。

单选题我在很多情况下都用抛硬币来决定该干什么。

单选题发展对外贸易对国民经济的重要作用不包括______。

单选题提出人和动物以几何级数增长，而粮食产量只能以算术级数增长的观点是( )。A．马歇尔B．马尔萨斯C．刘易斯D．大卫·李嘉图

单选题在信息系统建设时，必须进行各种测试，其中旨在验证修改的正确性及其影响而进行的测试属于______。 A.单元测试 B.集成测试 C.确认测试 D.回归测试

单选题发放股票股利与发放现金股利相比，其优点包括( )。A．可以提高每股价格B．有利于改善公司资本结构C．提高公司的每股收益D．避免公司现金流出

单选题Desertification, drought, and despair-that"s what global warming has in store for much of Africa. Or so we hear. Emerging evidence is painting a very different scenario, one in which rising temperatures could benefit millions of Africans in the driest parts of the continent. Scientists are now seeing signals that the Sahara desert and surrounding regions are greening due to increasing rainfall. If sustained, these rains could revitalize drought-ravaged regions, reclaiming them for farming communities. This desert-shrinking trend is supported by climate models, which predict a return to conditions that turned the Sahara into a lush savanna some 12,000 years ago. The green shoots of recovery are showing up on satellite images of regions including the Sahel, a semi-desert zone bordering the Sahara to the south that stretches some 2,400 miles. Images taken between 1982 and 2002 revealed extensive regreening throughout the Sahel, according to a new study in the journal Biogeosciences. The study suggests huge increases in vegetation in areas including central Chad and western Sudan. The transition may be occurring because hotter air has more capacity to hold moisture, which in turn creates more rain, said Martin Claussen of the Max Planek Institute for Meteorology in Hamburg, Germany, who was not involved in the new study. "The water-holding capacity of the air is the main driving force," Claussen said. While satellite images can"t distinguish temporary plants like grasses that come and go with the rains, ground surveys suggest recent vegetation change is firmly rooted. In the eastern Sahara area of southwestern Egypt and northern Sudan, new trees--such as acacias--are flourishing, according to Stefan Kr? pelin, a climate scientist at the University of Cologne"s Africa Research Unit in Germany. "Before, there was not a single scorpion, not a single blade of grass," saidKr?pelin, who has studied the region for two decades."Now you have people grazing their camels in areas which may not have been used for hundreds or even thousands of years. You see birds, ostriches, gazelles coming back, even sorts of amphibians coming back," he said." The trend has continued for more than 20 years. It is indisputable." An explosion in plant growth has been predicted by some climate models. For instance, in 2005 a team led by Reindert Haarsma of the Royal Netherlands Meteorological Institute in De Bilt, the Netherlands, forecast significantly more future rainfall in the Sahel. The study in Geophysical Research Letters predicted that rainfall in the July to September wet season would rise by up to two millimeters a day by 2080. Satellite data shows "that indeed during the last decade, the Sahel is becoming more green," Haarsma said.Even so, climate scientists don"t agree on how future climate change will affect the Sahel: Somestudies simulate a decrease in rainfall "This issue is still rather uncertain," Haarsma said. Max Planck"s Claussen said North Africa is the area of greatest disagreement among climate change modelers. Forecasting how global warming will affect the region is complicated by its vast size and the unpredictable influence of high-altitude winds that disperse monsoon rains, Claussen added."Half the models follow a wetter trend, and half a drier trend."