正确答案:

题目：垄断厂商的平均收益曲线与边际收益曲线是同一条曲线。

解析：垄断厂商的反需求函数为： 。所以 ，因此 与原反需求函数保持一致； ，故结论错误。

查看原题

举一反三的答案和解析：

[单选题]代谢性酸中毒的临床表现中，不包括

耳前叩击试验阳性

[单选题]A with B to C from D by

with B.to

解析：选［A］。此处填介词with表原因。本句的意思是：由于有我们的英国法官，新闻自由才会被安全把握。

[单选题]在新事物取代旧事物的过程中的决定性环节是

辩证的否定

[单选题]根据下列文章，回答26～30题。It used to be so straightforward. A team of researchers working together in the laboratory would submit the results of their research to a journal. A journal editor would then remove the authors names and affiliations from the paper and send it to their peers for review. Depending on the comments received, the editor would accept the paper for publication or decline it. Copyright rested with the journal publisher, and researchers seeking knowledge of the results would have to subscribe to the journal.No longer. The Internet and pressure from funding agencies, who are questioning why commercial publishers are making money from government-funded research by restricting access to it- is making access to scientific results a reality. The Organization for Economic Co-operation and Development （OECD） has just issued a report describing the far-reaching consequences of this. The report, by John Houghton of Victoria University in Australia and Graham Vickery of the OECD, makes heavy reading for publishers who have, so far, made handsome profits. But it goes further than that. It signals a change in what has, until now, been a key element of scientific endeavor.

the publication routine of laboratory reports.

解析：本题考查的是考生对第一段的理解。根据文章，第一段作者说到，实验室把他们的研究结果递交刊物，刊物的编辑在隐去作者姓名及相关信息后把论文递交给编审，根据审查结果或出版或拒绝出版此篇论文。版权由杂志社保留。研究者必须订阅杂志才能查找此研究结果的相关文章。很明显，此段讲述的是实验室报告的出版程序。选项A刊物编辑的背景信息和选项C作者与出版商的关系及选项D刊物出版的传统流程都未能准确概括本段的含义。

[多选题]我国工人阶级发生的变化并没有改变其作为国家主人的地位，他们仍然是

社会主义现代化的主要建设者

社会财富的主要创造者

先进生产力的代表者

人民民主专政国家的领导阶级

解析：ABCD