题干

我国唐朝的张志和在《玄贞子》中记载了著名的“人工虹”实验,“背日喷乎水,成虹霓之状”.该现象产生的原因是(  )

A:光的直线传播

B:漫反射

C:光的镜面反射

D:光的色散

上一题 下一题 0.0难度 选择题 更新时间:2014-09-28 03:43:00

答案(点此获取答案解析)

D

同类题3

阅读下面的文字,完成小题。

    《逍遥游》是《庄子》内7篇之首,又是整部《庄子》的开卷第一篇。不管《内篇》是否庄子手订,把《逍遥游》放在首篇,客观上也的确显示了它在整个《庄子》中的突出地位。这足以证明编书者是一位对庄子思想理解极深又有高明见解的人。

    庄子是中国文化史上一种独特的思想学说——逍遥哲学——的开创者。“逍遥”一词在《诗经》中就已经出现,但作为哲学概念和对人生心理状态的抽象哲学概括来使用,却始于《庄子》。它的内涵虽然继承了《诗经》中的基本义项,但总体而言又不同于《诗经》中的“逍遥”,而是更丰富了。从《逍遥游》的内容来看,“逍遥”在这里是指一种超凡脱俗,不为身外之物所累的一种心理状态和精神境界,近乎我们今天所说的“绝对自由”。追求“逍遥”是庄子人生哲学的主要内容,也是整个庄子思想的核心。庄子思想的庞大体系,就是围绕着这个核心构建起来的,其他一切思想观念和理论元素无不与这一核心存在着紧密联系。正是在这个基本点上,显示了庄子思想区别于其他任何一种思想体系的主要特质。因此我们可以说,庄子的整个思想体系就是一整套关于追求“逍遥”的“逍遥哲学”。若从“逍遥哲学”这个角度来观察庄子思想的各个部分,我们就会发现,庄子的自然哲学是它的理论基础,庄子的相对主义是它的认识论根源和走向逍遥境界的思想方法,庄子的社会思想是它产生及形成的心理土壤,庄子的文学思想和创作风格是它的具体表现和外化形式。

    庄子认为,宇宙中包括人类在内的万事万物都是不逍遥的,因为它的存在和生活方式都是“有所待”的,即有条件的、受限制的,因而都是不自由的,即使那些自以为逍遥,表面上看去也貌似逍遥的人与物,也是如此。比如,在《逍遥游》中描写的貌似逍遥的大鹏,是很不自由的,因为体型太大,飞翔时不仅需凭飓风之力来托负,而且还必须有大的空间才能展翅。正是由于这个原因,它才受到小鸟斥鴳的嘲笑。斥鴳认为自己的生活方式比大鹏优越,是最自由的。其实这正反映了它由于生活环境的狭小所带来的局限,因为它无能力到广阔天地中去遨游,形成了目光短浅的习性。这讲的是万物在空间上的局限。

    在时间上也是如此。朝菌不可能了解一天之外发生的事情,寒蝉不可能知道一年四季的变化,而生命长的灵龟和大椿也不能知道其生前死后的事。这讲的就是万物在时间上的局限。至于人类,看上去似乎比动、植物自由得多,实际上他们所受的限制也更多,除了名、利、富、贵之外,还有伦理道德、感情欲望等多种牵累,而且对死亡的恐惧和担忧的精神负担,远远超过其他生物。从受限制这个角度来审视人生,人是世界上所有事物之中最不自由的。所以庄子认为只有“无己”的“至人”、“无功”的“神人”、“无名”的“圣人”才是进入绝对自由境界的人,这就是庄子的理想人格,而“逍遥游”也就成了庄子理想的人生境界。

(节选于《智通庄子——游心于物之初》)

同类题5

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     “The gaokao,China's national college entrance exam,is winning more recognition as a way for universities overseas to evaluate Chinese students,”recruiting officers said.

    Stanley Nel,vice-president of international relations at the University of San Francisco in the United States,who is responsible for the university's admissions from China,said he had had several inquiries from US universities about how to recruit Chinese students on the basis of their gaokao scores.

    The Test of English as a Foreign Language (TOEFL) and the Scholastic Aptitude Test (SAT) have long been two musts for students from other counties,including China,to apply to study in the US.

    USF,a private university in California,started a pilot program to accept Chinese students based on their gaokao scores in 2015.The idea came from USF President Paul Fitzgerald's belief that standardized tests like the SAT are not very good predictors of how well students will do at the university."We are aware of the many criticisms that have been made of the gaokao,but it has the advantage of being what educational experts call a 'criterion-referenced' exam: It tests whether students are able to master a given body of knowledge,"he said.

    Currently,at least four higher education institutions in the US are recruiting Chinese students based on their gaokao performances.The Illinois Institute of Technology,a private institution in Chicago,started the practice first,in 2009.Outside the US,countries including Spain,Italy,Singapore,France and Australia also recognize gaokao scores.

    More than 200 students from China requested an interview with USF last year.74 of them were selected for a follow-up interview,44 received offers and 20 accepted the invitation and joined USF for the 2015 fall semester. Students admitted in this way have done "exceptionally well" in the past academic year,Nel added."The average GPA for all gaokao students is about 3.5 out of 4.For all other students—American and non-gaokao international students—American and non-gaokao international students—the average GPA is 3.2,"he said.

    Zhu Zihao gained admission in computer sciences at USF in 2015 through the program and performed well in his first academic year.He said that students who had experienced China's gaokao usually had comprehensive basic knowledge,which helps them excel in studies.

    Nel said,"students admitted through China's gaokao are not only smart but extremely conscientious(认真的)and hardworking."

    "This year we hope to recruit about 50 students in this way,and even more in years to come,"he said.

The gaokao

Past situation

Universities in the US evaluated Chinese students according to two____: The Test of English as a Foreign Language and the Scholastic Aptitude Test.

____situation

The gaokao is increasingly____as a way of evaluating Chinese students by universities abroad.

____of the people concerned

Stanley Nel—the person responsible for the university's admissions from China

●Chinese students having received good scores in the gaokao performed academically well when studying in America.

●Chinese students admitted through China' gaokao are smart, conscientious and____.

Paul Fitzgerald—USF President

●Despite the____the gaokao has received,it has its advantages.It tests students'____to master a given body of knowledge.

●Some standardized tests cannot____students' performance at the university well.

Zhu Zihao—a student admitted to USF in 2015

The____of the gaokao is helpful for the performance at the university well.

Future situation

More Chinese students will be recruited by the universities overseas____on their performance in the gaokao.