试题与答案

计量经济学模型研究的经济关系有那两个基本特征?

题型:问答题 简答题

题目:

计量经济学模型研究的经济关系有那两个基本特征?

答案:

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题型:单项选择题

Specific brain disorders can affect the perception of music in a very specific way. Experiments done on epileptics decades ago showed that stimulating certain areas of the temporal lobe on both sides of the brain awakened "musical memories"—vivid re-creations of melodies that the patients had heard years earlier. Lesions in the temporal lobe can result in so-called musicogenic epilepsy, an extremely rare form of the disorder in which seizures are triggered by the sound of music. Autism offers an even greater puzzle. People with this condition are mentally deficient, yet most are proficient musicians; some are "musical savants" possessed of extraordinary talent.
The opposite is true of the less than 1 percent of the population who suffer from amusia, or tree tone deafness. They literally cannot recognize a melody, let alone tell two of them apart, and they are incapable of repeating a song (although they think they are doing correctly). Even simple, familiar tunes such as Frere Jacques and Happy Birthday are mystifying to musics, but when the lyrics are spoken rather than sung, musics are able to recognize the song immediately.
But for instrumentalists, at least, music can evidently trigger physical changes in the brain’s wiring. By measuring faint magnetic field emitted by the brains of professional musicians, a team led by Christo Pantev of the University of Muenster’s Institute of Experimental Audiology in Germany has shown that intensive practice of an instrument leads to discernible enlargement of parts of the cerebral cortex, the layer of gray matter most closely associated with higher brain function.
As for music’s emotional impact, there is some indication that music can affect levels of various hormones, including cortisol (involved in arousal and stress), testosterone (aggression and arousal) and oxytocin (nurturing behavior) as well as trigger release of the natural opiates known as endorphins. Using PET canners, Zatorre has shown that the parts of the brain involved in processing emotion seem to light up with activity when a subject hears music.
As tantalizing as these nits of research are, they barely begin to address the mysteries of music and the brain, including the deepest question of all: Why do we appreciate music Did our musical ancestors have an evolutionary edge over their tin-eared fellow Or is music, as M. I. T. neuroscientist Steven Pinker asserts, just "auditory cheesecake," with no biological value Given music’s central role in most of our lives, it’s time that scientists found the answers.

What can music do to an instrumentalist according to the passage

A.Music can lead to the enlargement of all the layers of gray.

B.Music can cause the brain to emit magnetic field.

C.Music can stimulate to some degree the change of brain structure.

D.Music can trigger physical change when he/she is playing the instrument.

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题型:单项选择题 案例分析题

暗筒式日照仪主要通过感光纸的感光历时记录日照时数。读“某高原日照变化趋势和分布”图(单位:%(10a)-1,图中空心表示增加或未变,实心表示减少),回答下列小题。

近45年来,该地区无论是总云量,还是中低空水汽条件的变化都很小,则导致其日照显著变化的主要原因可能是()

A.全年受准静止锋冷气团控制,云量较高,日照显著减少

B.全年受准静止锋暖气团爬升影响,降水增多,日照显著减少

C.全球变暖,热带北移,该地太阳辐射强度减弱

D.自上世纪80年代以来该地工业化进程较快,大量气溶胶和污染物排放量减弱了到达地面的太阳辐射强度

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