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多巴胺是治疗帕金森病的首选药物，但多巴胺很难通过血脑屏障进入脑内，故制备成其前体药物左旋多巴。左旋多巴不仅被脑内的脱羧酶脱羧，也能被消化道、肝中存在的脱羧酶脱羧转变为多巴胺。左旋多巴的肠肝首过效应比较强。实验证明，存在于肠道壁内的脱羧酶是左旋多巴产生首过效应的主要原因之一，而且脱羧酶的活性在小肠回肠末部最高，而左旋多巴的主要吸收部位在十二直肠，同时这种脱羧酶有饱和现象。为此我们最好设计成
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TEXT E As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computers is not that they think less well than a man, but that they think at all. The early electronic computer did not have much going for it except a marvelous memory and some good math skills. But today the best models can be wired up to learn by experience, follow an argument, ask proper questions and write poetry and music. They can also carry on somewhat puzzling conversations. Computers imitate life. As computers get more complex, the imitation gets better. Finally, the line between the original and the copy be comes unclear. In another 15 years or so, we will see the computers as a new form of life. The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives can be programmed into the computer’s brain just as nature programmed then into our human brain as a part of the equipment for survival. Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that pre vents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain at one time and it freezes up. We are still in control, but the capabilities of computers are in creasing at a fantastic rate, while raw human intelligence is changing slowly, if at all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain. That does not mean the evolution of intelligence has ended on the earth. Judging by the past, we can expect that a new species will arise out of man, surpassing his achievements as he has surpassed those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man’s flesh-and-blood descendants. The new kind of intelligent life is more likely to be made of silicon. Though he thinks highly of the development of computer science, the author doesn’t mean that
系夫妻，家住安徽归池县城，生有一子陈小勇。在陈小勇半岁的时候，陈某因犯盗窃罪入狱服刑三年，故陈小勇被送到刘某的母亲周某处帮助抚养。周某原住在安徽竹淄县城，在陈小勇一岁时周某携带陈小勇回其老家湖南营榴桐伴乡的农村居住。现陈某已刑满出狱，想到3年未见儿子，急切地要将儿子接回家自己抚养。周某认为陈某曾犯罪服刑，品德不端，可能影响小孩的成长，因此拒绝了陈某的要求。陈某为此起诉要求陈小勇的抚养权，请求法院判令周某交回陈小勇。刘某向审判人员表示，反对其母继续抚养小孩，想自己抚养小孩，但碍于情面，不愿与其母对簿公堂。请回答下列问题。 刘某在本案中( )。
饰面板安装工程适用于外墙饰面板安装工程及相应高度不大于24m、抗震设防烈度不大于7度的外墙饰面板安装工程的质量验收。( )
2003年，A公司销售收入为1 000万元。A公司的产品质量保证条款规定：产品售出后一年内，如发生正常质量问题，A公司将免费负责修理。根据以往的经验，如果出现较小的质量问题，则须发生的修理费为销售收入的1%；而如果出现较大的质量问题，则须发生的修理费为销售收入的2%。据预测，本年度已售产品中，有80%不会发生质量问题，有15%将发生较小质量问题，有5%将发生较大质量问题。据此，2003年年末A公司应确认的负债金额为 ( )万元。
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