题目内容
（请给出正确答案）
A.two
B.three
C.four
D.five
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更多“There are _____ Versions of CLT.”相关的问题
Sleep is part of a person's daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your sleep cycle is as follows. When you first drift off into slumber (安睡), your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing were slow and become quite regular. Your brain waves slow down a bit too, with the alpha rhythm of rather fast waves predominating for the first few minutes. This is called stage 1 sleep. For the next half hour or so, as you relax more and more, you will drift down through stage 2 and stage 3 sleep. The lower your stage of sleep, the slower your brain waves will be. Then about 40 to 60 minutes after you lose consciousness you will have reached the deepest sleep of all. Your brain waves will show the large slow waves that are known as the delta rhythm. This is stage 4 sleep. You do not remain at this deep fourth stage all night long, but instead about 80 minutes after you fall into slumber, your brain activity level will increase again slightly. The delta rhythm will disappear, to be replaced by the activity pattern of brain waves. Your eyes will begin to dart around under your closed eyelids (眼皮) as if you were looking at something occurring in front of you. This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM sleep. It is during REM sleep period, your body will soon relax again, your breathing will grow slow and regular once more, and you will slip gently back from stage 1 to stage 4 sleep — only to rise once again to the surface of near consciousness some 80 minutes later.
The stages of sleep take on ____
A) an irregular aspect.
B) a regular aspect
C) a punctual aspect
D) a similar aspect
本题为单选题，请给出正确答案及解析，谢谢！
听力原文： Broadly speaking, there are two types of paintings: representational and abstract. The former portrays specific, recognizable physical objects.
For most of history, the primary purpose of painting had been to portray images. Starting with the Post-Impressionists, however, the emphasis began to shift to unconscious feeling.
There are two types of abstract paintings. "Abstracted" paintings may not look realistic, but you can get an idea of what you are looking at. "Pure" abstract paintings are just shapes, colors, lines, patterns, and so on.
In truth, there is a lot more to abstract art than what meets the eye. To truly appreciate a work of art, you need to understand there must be context involved and a particular environment created. More importantly, art allows us indirect access to our inner psyche. Great art affords a way to get in touch with the unconscious part of our existence, even if we don't realize what we are doing.
The reason abstract art has the potential to be so powerful is that it keeps the conscious distractions to a minimum. This, of course, only works if you cooperate with the artist. If you are to truly appreciate a work of art, you must be willing to let yourself go, to put yourself in the hands of the artist, so to speak, and let him take you wherever he wants.
Broadly speaking, there are two types of paintings :【21】and abstract. The former portrays specific, recognizable physical objects.
For most of history, the primary purpose of painting had been to portray images. Starting with the Post-Impressionists, however, the【22】began to shift to unconscious feeling.
There are two types of abstract paintings. "【23】" paintings may not look realistic, but you can get an idea of what you are looking at. "【24】" abstract paintings are just shapes, colors, lines, patterns ,, and so on.
In truth, there is a lot more to abstract art than what meets the eye. To truly appreciate a work of art, you need to understand there must be【25】involved and a particular【26】created. More importantly, art allows us indirect access to our inner【27】. Great art affords a way to get in touch with the unconscious part of our【28】, even if we don't realize what we are doing.
The reason abstract art has the【29】to be so powerful is that i: keeps the conscious distractions to a minimum. This, of course, only works if you【30】with the artist. If you are to truly appreciate a work of art, you must be willing to let yourself go, to put yourself in the hands of the artist, so to speak, and let him take you wherever he wants.
(21)
A、socials
B、associations
C、society
D、assimilation
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