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水杨酰胺在人体中的主要代谢反应是首先经胃肠道黏膜中的硫酸结合，然后在肝脏内与葡萄糖醛酸的结合反应。当剂量增加时，胃肠道内硫酸结合物的生成率逐渐降低，而此时由肝脏内葡萄糖醛酸结合物的生成率却升高，其原因是
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某公司正准备购买一套设备，原始投资额为800万元，预计建设期为1年，另需垫支流动资金20万元。投产后每年增加销售收入280万元，付现成本65万元。该项固定资产预计使用10年，按直线法提取折旧，预计残值为50万元。该公司拟按目前产权比率为2/5的目标结构来追加资金，预计负债的利息率为12%，所得税税率为30%。公司过去没有投产过类似项目，但新项目与另一家上市公司的经营项目类似，该上市公司的β系数为1.5，其资产负债率为50%，目前证券市场的无风险收益率为5%，证券市场的平均收益率为14%。[要求]计算项目的净现值，并评价项目的可行性（加权平均资本成本计算结果取整）
At present companies and industries like tosponsor sports events. Two reasons are put forwardto explain this phenomenon. The first reason is thatthey get (1) ______ throughout the world. The second (1)______ reason is that companies and industries (2) ______ (2)______ money, as they get reductions in the tax they owe ifthey sponsor sports or arts activities. As sponsorship is (3) ______, careful thinking (3)______is required in deciding which events to sponsor. It isimportant that the event to be sponsored (4) ______ (4)______the product(s) to be promoted. That is, the right(5) ______ and maximum product coverage must be (5)______guaranteed in the event.Points to be considered in sports sponsorship.Popularity of the eventInternational sports events are big (6) ______ event, (6)______which get extensive coverage on TV and in thepress. Smaller events attract fewer people.Identification of the potential audienceAiming at the right audience is most important forsmaller events. The right audience would attractmanufacturers of other related products like(7)______, etc. (7)______Advantages of sponsorshipAdvantages are longer-term.People are expected to respond (8)______ to the (8)______products promoted and be more likely to buy them. Advertising is (9) ______ the mind. (9)______ Sponsorship is better than straight advertising: a) less (10)______ (10)______ b) tax-free
TEXT B The biographer has to dance between two shaky positions with respect to the subject. Too close a relation, and the ’miter may lose objectivity. Not close enough, and the writer may lack the sympathy necessary to any effort to portray a mind, a soul—the quality of life. Who should write the biography of a family, for example Because of their closeness to the subject, family members may have special information, but by the same token, they may not have the distance that would allow them to be fair. Similarly, a king’s servant might not be the best one to write a biography of’ that king. But a foreigner might not have the knowledge and sympathy necessary to write the king’s biography—not for a readership from within the kingdom, at any rate. There is no ideal position for such a task. The biographer has to work with the position he or she has in the world, adjusting that position as necessary to deal with the subject. Every position has strengths and weaknesses: to thrive, a writer must try to become aware of these, evaluate them in terms of the subject, and select a position accordingly. When their subjects are heroes of famous figures, biographies often reveal a democratic motive: they attempt to show that their subjects arc only human, no better than anyone else. Other biographies are meant to change us, to invite us to become better than we are. The biographies of Jesus found in the Bible are in this class. Biographers may claim that their account is the" authentic" one. In advancing this claim, they are helped if the biography is" authorized" b the subject; this presumably allows the biographer special access to private information. "Unauthorized" biographies also have their appeal, however, since they can suggest an independence of mind in the biographer. In book promotions, the" unauthorized “characterization usually suggests the prospect of juicy gossip that the subject had hoped to suppress. A subject might have several biographies, even several" authentic" ones. We sense intuitively that no one is in a position to tell " the" story of a life, perhaps not even the subject, and this has been proved by the history of biography. An unauthorized biography is likely to attract more readers because______.
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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