男，11岁。2天前不慎碰伤右上臂，疼痛伴活动受限。X线片如图。应首先考虑的诊断是（）

《工程建设项目施工招标投标办法》规定，招标代理机构可以在其资格等级范围内承担( )招标事宜。

A．拟订招标方案

B．出售资格预审文件

C．编制标底

D．草拟合同

E．编写评标报告

简述磨损的分类？

分析材料回答下列问题．

材料一：我国水资源从地区分布来看是不均匀的，华北地区人口占全国的24.1%，耕地占全国的45%，水资源占全国的6%，从降水的季节分配来看，我国绝大部分地区降水集中在5-10月，而华北地区则高度集中在7-8月，这两个月的降水量占全年降水量的80%，冬春季节则出现持续干旱．

材料二：多年来，邯郸市年平均降雨量约为548.9毫米，淡水资源总量为14.85亿立方米，人均、亩均占有水资源分别为170.4立方米和152.2立方米．人均占有量仅占全国的7%，属于极度缺水地区．加之本区人口众多且人口增长特别迅速，使农业用水、工业用水成倍增长，而人为的用水浪费、水资源污染等原因更是加重了水资源的严重匮乏．

（1）根据材料，请你从自然原因和社会原因两方面分析邯郸水资源紧张的原因．

（2）针对邯郸市严重缺水的现状，你认为应该采取哪些保护水资源和节约用水的措施？

（3）为了唤起人们对淡水资源的危机意识，请你设计一则公益广告词．

2008年12月6日下午，法国总统萨科齐在波兰会见达赖喇嘛，招致中国政府与民众的强烈抗议。从根本上说，这是因为( )

A．达赖喇嘛不听从中央政府的劝告

B．主权是一个国家的生命和灵魂

C．萨科齐不再是中国政府的好朋友

D．中国的综合国力已经大大提高

FOR the past two years in Silicon Valley, the centre of America’s technology industry, conference-goers have entertained themselves playing a guessing game: how many times will a speaker mention the phrase "long tail" It is usually a high number, thanks to the influence of the long tail theory, which was first developed by Chris Anderson, the editor of Wired magazine, in an article in 2004. Though technologists and bloggers chuckle at how every business presentation now has to have its long-tail section, most are envious of Mr Anderson, whose brainwave quickly became the most fashionable business idea around.

Whether a blockbuster film, a bestselling novel, or a chart-topping rap song, popular culture idolizes the hit. Companies devote themselves to creating them because the cost of distribution and the limits of shelf space in physical shops mean that profitability depends on a high volume of sales. But around the beginning of this century a group of internet companies realized that with endless shelves and a national or even international audience online they could offer a huge range of products—and make money at the same time.

The niche, the obscure and the specialist, Mr Anderson argues, will gain ground at the expense of the hit. As evidence, he points to a drop in the number of companies that traditionally calculate their revenue/sales ratio according to the 80/20 rule—where the top fifth of products contribute four-fifths of revenues. Ecast, a San Francisco digital jukebox company, found that 98% of its 10,000 albums sold at least one track every three months. Expressed in the language of statistics, the experiences of Ecast and other companies such as Amazon, an online bookseller, suggest that products down in the long tail of a statistical distribution, added together, can be highly profitable. The internet helps people find their way to relatively obscure material with recommendations and reviews by other people and (for those willing to have their artistic tastes predicted by a piece of software) computer programs which analyze past selections.

Long-tail enthusiasts argue that the whole of culture will benefit, not just commercial enterprises. Television, film and music are such bewitching media in their own right that many people are quite happy to watch and listen to what the mainstream provides. But if individuals have the opportunity to pick better, more ideally suited entertainment from a far wider selection, they will take it, according to the theory of the long tail. Some analysts reckon that entire populations might become happier and wiser once they have access to thousands of documentaries, independent films and sub-genres of every kind of music, instead of being subjected to what Mr Anderson calls the tyranny of lowest-common-denominator fare. That might be taking things a bit far. But the long tail is certainly one of the internet’s better gifts to humanity.

The phrase "lowest-common-denominator" (Line 9, Paragraph 4) probably refers to（）

A. the long tail theory

B. the disadvantaged group

C. the profitability

D. the hit