在380V、50HZ的三相四线制供电系统中,线电压值为()。

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问题:

在380V、50HZ的三相四线制供电系统中,线电压值为()。

考点:起重机操作证考试门座式起重机司机(高级)门座式起重机司机(高级)题库
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简述贯彻因材施教原则的基本要求。

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以下函数为R上的偶函数的是(  )
A.y=x2B.y=x5C.y=x+
1
x
D.y=2x
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电视剧《大染坊》叙述了周村人陈寿亭从一无所有的乞丐到资产雄厚的企业家的创业历程。该片的主题歌写到:“总以为彩虹就在眼前,我却在风雨中越走越远,这一场荣华富贵好心酸。”造成剧中主人公“荣华富贵好心酸”的主要原因是                                                         [ ]

A.  出身贫贱低微,社会地位低下。

B.  个人情感历经曲折和磨难

C.  深受中外反动势力的欺凌

D.  商场上钩心斗角,尔虞我诈的刺激。

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下列除哪种药物外均可做成缓控释制剂()

A.抗生素

B.抗心律失常

C.降压药

D.抗哮喘药

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You’ve had a problem, you’ve thought about it till you were tired, forgotten it and perhaps slept on it, and then flash! When you weren’t thinking about it suddenly the answer has come to you, as a gift from the gods.

Of course all ideas don’t come like that, but the interesting thing is that so many do, particularly the most important ones. They burst into the mind, glowing with the heat of creation. How they do is a mystery. (46) Psychology does not yet understand even the ordinary process of conscious thought, but the emergence of new ideas by a "leap in thought" is particularly intriguing, because they must have come from the somewhere. For the moment let us assume that they come from the "unconscious". (47)This is reasonable, for the psychologists use this term to describe mental processes which are unknown to the subject, and creative thought consists precisely in what was unknown becoming known.

(48) It seems that all truly creative activity depends in some degree on these signals from the unconscious, and the more highly intuitive the person, the sharper and more dramatic the signals become.

But growth requires a seed, and the heart of the creative process lies in the production of the original fertile nucleus from which growth can proceed. (49) This initial step in all creation consists in the establishment of a new unity from disparate elements, of order out of disorder, of shape from what was formless. The mind achieves this by the plastic reshaping, so derived from a new unit, of a selection of the separate elements derived from experience and stored in memory. Intuitions arise from richly unified experience.

(50) This process of the establishment of new form must occur in pattern of nervous activity in the brain, lying below the threshold of consciousness, which interacts and combines to form more comprehensive patterns. Experimental physiology has not yet identified this process, for its methods are as yet insufficiently refined, but it may be significant that a quarter of the total bodily consumption of energy during sleep goes to the brain, even when the sense organ are at rest, to maintain the activity of ten thousand million brain cells. These cells, acting together as a single organ, achieve the miracle of the production of new patterns of thought. No calculating machine can do that, for such machines can "only do what we know how to design them to do", and these formative brain processes obey laws which are still unknown.

Can any practical conclusions be drawn from the experience of genius Is there an art of thought for the ordinary person Certainly there is no single road to success; in the world of the imagination each has to find his own way to use his own gift.

(47)This is reasonable, for the psychologists use this term to describe mental processes which are unknown to the subject, and creative thought consists precisely in what was unknown becoming known.

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