巧解地理选择题

一、选择题命题规律1.题干围绕一个中心,选择项和题干的关系一致。2.干扰项有效,能反映考生的典型错误。3.各选项的结构、长度大体一致。4.正确选项分布均匀。     

中国南方调整水稻种植格局——一种水稻生产预先适应气候变化的选择(英文)

Rice planted in southern China accounts for 94% of the total in sown acreage and 88% of the total in production, which matters a lot to Chinese food security. However, due to the prolonged conflict between water availability and rice growth in spatial/temporal distribu-tion, rice production suffers from seasonal drought at acreage of 16%-22%, which compro-mises food production capacity and food security. Focusing on the spatial distribution of seasonal drought with rice and the practices to adapt to it, and based on an analysis of bal-anced water supply for and demand by rice at a growing season scale during 1981-2030, this paper assesses the changing seasonal drought in the process of rice production under the changing climate in the future, and identifies general rice re-cultivation options for climate change adaptation. Some conclusions can be drawn as follows. (1) Rice suggests a decline in seasonal drought, with early season rice (early rice hereafter) by 12,500 km2, middle season rice (middle rice) by 80,000 km2, and in particular late season rice (late rice) by 25,000 km2, which accounts for almost 20% of its cultivated acreage. It is indicated that due to climate change, seasonal drought in major rice producing areas tends to alleviate in general, late season rice in particular. (2) Future climate change brings about a significant impact on the spatial/temporal distribution of water resources in rice producing areas in China. Based on ’pre-designed’ adaptation actions for rice-re-cultivation, the rice cultivation pattern undergoes a significant alteration between 1981-2000 and 2001-2030. In eastern Guizhou and western Hunan, the pattern of single early plus single dry farming is changed into double cropping. In eastern Hunan, the pattern of dry cropping is changed into single early plus single dry farming. In northern Anhui, the pattern of dry farming cropping is changed into middle rice. All this is aimed at a potential adequate availability of water for rice production in the future. (3) Rice re-cultivation patterns developed in this paper help re-balance water demand and supply for rice growth using the spatial analysis tool to adapt rice growth to the changing water avail-ability from spatial perspective, and come up with rice producer-friendly re-cultivation options in response to climate change.     

一道值得商榷的试题

本文所提到的这道试题，系1990年的全国高考题，至今已四个多年头，许多地理复习用书和教学杂志往往还把其作为一个典型范例加以选用．分析，还有人效其某些命题思路编制习题，然而，笔者认为该题选项C作为正确答案是错误的。原题及答案如下：     

美空军需要SI公司提供全球定位系统的系列支持

SI国际有限公司最近与美国空军空间司令部签订一项初始合同，为全球定位系统提供工程、计划和编程支持，竞争性任务订单为期一年，同时还有4个为期1年的合同选项。如果所有的选项都实施．整个合同在5年内的经费为1146万美元。     

关于设计招标中商务标设置的规范化选项

根据有关法规的要求,结合设计工作的实际需要,提出了设计招标中商务标设置的规范化选项,以及相应的评审标准和方法。     

国家战略重点西移中我区部分相关项目的评价及选项研究

“九五”期间,国家将加大对中西部地区的投入,战略重点逐步向中西部转移,国家将采取包括优先安排资源开发和基础设施建设项目,增加财政支持和建设投资等一系列政策措施支持中西部发展。为了抓住这个机遇,加快我区经济发展速度,增强经济实力,逐步缩小与沿海各地和东部地区的差距,根据自治区的国土资源、政策、经费、技术、市场等诸因素进行了全面详细的分析研究,筛选了一批有前途、有潜力、有市场、有基础的项目。     

转化图形 巧解试题

正有些地理图形反映的是地理事物的局部,或比较抽象,难以解读。但如果按照图形的展现规律转化图形,将使图形更加完整、直观,变换思维角度,可以利用转化后的图形巧解地理问题,在教学中帮助学生更好地解答此类试题,提高得分率。     

2006年地理高考复习练习卷

第一卷（选择题共70分） 一、选择题（共70分） （一）单项选择题：本大题共20小题。每小题2分。共40分。在每小题给出的四个选项中。只有一项是符合题目要求的。     

在Oracle中实现空间数据的对象化和拓扑化存贮

讨论了Oracle数据库的空间数据存贮方案,即对象关系模式和关系模式,并针对这两种方案详细论述了它们的应用方法及其特点.     

在Oracle中实现空间数据的对象化和拓扑化存贮

讨论了Oracle数据库的空间数据存贮方案，即对象关系模式和关系模式，并针对这种方案详细论述了它们的应用方法及其特点。