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B型题 心功能不全或血容量相对过多的表现是()

A. 中心静脉压低,血压低
B. 中心静脉压正常,血压低
C. 中心静脉压低,血压正常
D. 中心静脉压高,血压低
E. 中心静脉压高,血压正常

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For the past several years, the Sunday newspaper supplement Parade has featured a column called "Ask Marilyn". People are invited to query Marilyn vos Savant, who at age 10 had tested at a mental level of someone about 23 years old; that gave her an IQ of 228--the highest score ever recorded. IQ tests ask you to complete verbal and visual analogies, to envision paper after it has been folded and cut, and to deduce numerical sequences, among other similar tasks. So it is a bit confusing when vos Savant fields such queries from the average Joe (whose IQ is 100) as. What’s the difference between love and fondness Or what is the nature of luck and coincidence It’s not obvious how the capacity to visualize objects and to figure out numerical patterns suits one to answer questions that have eluded some of the best poets and philosophers.Clearly, intelligence encompasses more than a score on a test. Just what does it mean to be smart How much of intelligence can be specified, and how much can we learn about it from neurology, genetics, computer science and other fieldsThe defining term of intelligence in humans still seems to be the IQ score, even though IQ tests are not given as often as they used to be. The test comes primarily in two forms; the Stanford-Binet Intelligence Scale and the Wechsler Intelligence Scales (both come in adult and children’s version). Generally costing several hundred dollars, they are usually given only by psychologists, although variations of them populate bookstores and the World Wide Web. Superhigh scores like vos Savant’s are no longer possible, because scoring is now based on a statistical population distribution among age peers, rather than simply dividing the mental age by the chronological age and multiplying by 100. Other standardized tests, such as the Scholastic Assessment Test (SAT) and the Graduate Record Exam (GRE), capture the main aspects of IQ tests.Such standardized tests may not assess all the important elements necessary to succeed in school and in life, argues Robert J. Sternberg. In his article "How Intelligent Is Intelligence Testing", Sternberg notes that traditional tests best assess analytical and verbal skills but fail to measure creativity and practical knowledge, components also critical to problem solving and life success. Moreover, IQ tests do not necessarily predict so well once populations or situations change. Research has found that IQ predicted leadership skills when the tests were given under low-stress conditions, but under high-stress conditions, IQ was negatively correlated with leadership --that is, it predicted the opposite. Anyone who has toiled through SAT will testify that test-taking skill also matters, whether it’s knowing when to guess or what questions to skip. What can be inferred about intelligence testing from Paragraph 3()

A. People no longer use IQ scores as an indicator of intelligence.
B. More versions of IQ tests are now available on the Internet.
C. The test contents and formats for adults and children may be different.
D. Scientists have defined the important elements of human intelligence.

阅读下面短文。完成41~44题。科学家曾这样想象:如果由带正电的电子与带负电的原子核组成原子,那么就是反原子,反原子则可构成反物质。倘若反物质与物质相遇就会爆炸成光辐射。这一“反物质假说”,在21世纪将逐步变成现实。2002年9月欧洲核子研究中心宣布,世界各地9个研究所的39位科学家通力合作,在受控条件下成功制造了约5万个反氢原子。科学家也在研究过程中发现了正电子,这使他们更相信所有粒子都有其反粒子,从而更有信心揭开反物质之谜。世界公认的宇宙诞生理论大爆炸学说认为,宇宙是从140亿年前一个“极小的点”爆炸而来的,在那个点之外,“没有时间、没有空间、没有能量、没有物质”,大爆炸产生了大量的正能量和负能量,而总能量仍然为零。能量与物质是可以相互转化的,那么,大量的能量亦应转化为正物质和反物质。这是反物质理论研究的基础。但要想在反物质乃至宇宙诞生理论研究上取得突破,还需要在研究实践中寻求更新的科学思想作指导。140亿年前宇宙诞生时产生了大体相等的物质与反物质。这些反物质在哪里?宇宙存在着由反物质组成的星系,是一种解释;宇宙诞生产生的物质多于反物质,二者相互湮灭后,剩余的物质构成了现在之宇宙,是另一种解释。科学家没有放弃在自然界中寻找反物质的努力,并且成功地在实验室中制造出反物质,以便更直接地研究反物质现象。科学家认为,先进的探测手段在反物质理论研究中不可或缺。根据伽玛射线探测卫星提供的有关资料,有的科学家认为在银河系上方3500光年处可能存在不断喷射反物质的源头。航天飞机携带的阿尔法磁谱仪升空探测虽未发现反物质,但它最近几年在太空采集的大量数据,对反物质理论研究的突破性进展会有巨大帮助。在自然界寻找反物质的难度甚大,而利用加速器将负离子流射向氙原子核已能制造反氢原子,因此科学家更注重在实验室中进行的反物质研究。目前在实验室制造反基本粒子并不困难,但将正电子与负原子核结合并能证实它们已成为反原子的工作极为复杂。欧洲核子研究中心耗资1150万美元研制的加速器利用磁场将高能反质子减速为光速1/10的反质子,制造出约5万个低能量状态的反氢原子。跨过这个里程碑再前进,还需要科学家研制功能更强大的“工具”。“反物质假说”认为:反物质与物质相遇会释放所有的能量。科学家预测该释放率远远高于氢弹爆炸。航天专家已经对反物质燃料的价值表示神往。科学发现的应用价值是人所关心的。当年一位贵妇人问电的发现者法拉第:“电有什么用呢?”法拉第反问了一句:“新生的婴儿有什么用呢?”关于反物质的应用价值,目前只能作些模糊预测。 依据文中的信息进行推断,不正确的一项是()。

A. 低能量状态的反原子是在受控条件下制造的,制造高能量状态的反原子必须解除受控条件
B. 140亿年前爆炸的那个“极小的点”,可能有能量和物质存在,并且具有时间性和空间性
C. 人类能够得用高科技手段在实验室制造反原子,并不意味宇宙中一定有自然状态的反物质
D. 如何将反物质与物质相遇弓I发的爆炸辐射纳入可控制系统,是研制反物质燃料必须解决的难捌

糖尿病患者的膳食应严格限制单糖。( )

A. 对
B. 错

Directions:Write a letter to your university library, making suggestions for improving its service.You should write about I00 words on ANSWER SHEET 2.Do not sign your men name at the end of the letter. Use "LiMing" instead.Do not write the address.

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