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已选分类 医学中医学中医诊断学
单选题下列哪项为初按不甚热,按久热明显
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单选题The topic of cloning has been a politically and ethically controversial one since its very beginning. While the moral and philosophical aspects of the issues are entirely up to the interpretation of the individual, the application of cloning technology can be studied objectively. Many in the scientific community advocate the use of cloning for the preservation and support of endangered species of animals, which aside from cloning, have no other practical hope for avoiding extinction. The goal of the use of cloning to avoid extinction is the reintroduction of new genes into the gene pool of species with few survivors, ensuring the maintenance and expansion of genetic diversity. Likely candidates for this technique are species known to have very few surviving members, such as the African Bongo Antelope, the Sumatran Tiger, and the Chinese Giant Panda. In the case of Giant Panda, some artificial techniques for creating offspring have already been performed, perhaps paving the way for cloning as the next step in the process. With the estimated population of only about 1000 Giant Pandas left in the world, the urgency of the situation has led to desperate measures. One panda was born through the technique of artificial insemination in the San Diego Zoo in the United States. "Hua Mei" was born in 1999 after her parents, Hsing-Hsing and Ling-Ling, had trouble conceiving naturally. The plan to increase the Giant Panda population through the use of cloning involves the use of a species related to the Giant Panda, the American Black Bear. Egg cells will be removed from female black bears and then fertilized with Panda cells such as those from Ling-Ling or Hsing-Hsing. The fertilized embryo will then re-implanted into the black bear, where it will grow and mature, until a new panda is delivered from the black bear host. Critics of cloning technology argue that the emphasis on cloning as a method by which to preserve species will draw funding away from other methods, such as habitat preservation and conservation. Proponents of cloning counter that many countries in which many endangered species exist are too poor to protect and maintain the species' habitats anyway, making cloning technology the only practical way to ensure that those species survive to future generations. The issue is still hotly debated, as both sides weigh the benefits that could be achieved against the risks and ethical concerns that constantly accompany any argument on the issue. (402 words)Notes: ethically 道德上。gene pool 基因库。insemination n.受精。fertilize 使受精。embryo 胚胎。proponent支持者,拥护者。weigh A against B权衡A和B的利弊。
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单选题首先提出“治风先治血,血行风自灭”的痹证治疗法则的是
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单选题医生在诊脉时运用手指的哪个部位
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单选题发热,午后热甚,身热不扬,属于A.骨蒸劳热B.湿温潮热C.阴虚内热D.阳明潮热E.气虚发热
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单选题The sudden, dramatic explosion in value of online social media sites like Facebook and Twitter is reminiscent of the rise, about 15 years ago, of the online businesses that created the "dotcom bubble. " The Internet was far less widely used than it is today. Still, visionaries saw the potential for the Internet we have today, so virtual companies sprung up and grew like weeds as investors threw money their way. Some, like Google and Amazon, developed an enduring online presence and lasting financial value. But far too many quickly lost value when it became apparent that their rapid growth wasn't yielding revenue. So, how much is Facebook's network of users really worth? The potential is clear—when so many people are gathered in one virtual place, offering so much personal information about themselves, they create an unprecedented platform for targeted advertising. Or they would, if they were on the network to shop. When eBay and Amazon suggest products to their customers, they're talking to people who've already proven that they're interested in buying similar products. People go on Facebook for a variety of reasons-to catch up with old friends, share pictures, make new acquaintances, and talk, sometimes endlessly, about themselves. Whether they'll appreciate having their virtual conversations interrupted by advertising, targeted or not, remains unclear. It's also unclear whether Facebook will actually be able to share information about its users' browsing habits with advertisers. Complaints about the ineffectiveness of Facebook's privacy policies have arisen in multiple countries, part of a larger social concern about how private information gets used on line. In December, the Federal Trade Commission issued a proposed framework that, among other things, would permit Facebook users to block advertisers from accessing information about their online interests. If that framework is implemented and widely used by Facebook subscribers, it could seriously impair the site's value as a potential platform for targeted marketing. What is clear is that Goldman Sachs has a significant interest in Facebook's financial value, at least for the short term. Goldman Sachs' decision to invest heavily in Facebook has had some interesting impacts. For one thing, the investment has allowed Facebook an opportunity to postpone issuing an IPO. That means that, at least for the moment, Facebook doesn't yet have to disclose its finances or publicly address investor complaints. Goldman Sachs' investment also puts the firm in an ideal position to handle Facebook's IPO when it eventually is issued, perhaps sometime next year. That, of course, has the potential to generate substantial revenues for Goldman Sachs' clients. Google's 2004 IPO raised an initial $1.2 billion for the company. After all the propaganda, Facebook's IPO can hardly be expected to raise less. However, there remains a significant question as to whether Facebook's potential for generating income is more virtual than real. If it turns out that Facebook can't live up to its potential for generating advertising revenue, venture capitalists who invest for the long term may get burned.
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单选题导致皮肤、口鼻干燥的邪气是
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单选题下列各项中不属于实证临床表现的是
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单选题对于实践的唯物主义者即共产主义者来说,全部问题在于 A.使现存世界革命化,实际地反对并改变现存的事物 B.坚持唯物主义观点 C.反对宗教神学观点 D.反对形而上学观点
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单选题“升已而降,降者谓天;降已而升,升者谓地。”说明了阴阳学说中的什么内容
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单选题A.窜痛胀痛B.突发绞痛C.固定剌痛D.冷痛拘急
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单选题清络饮的功用是
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单选题以下哪项不是引起血虚的常见原因A.失血多未及时补充B.阴液亏少,干燥失润C.瘀血内阻,新血不生D.虫寄肠道,耗损营养
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单选题 可疑小肠扭转的肠结初期首先选择的治疗方法是 A、通里攻下 B、清热解毒 C、活血化瘀 D、颠簸疗法 E、手术治疗
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单选题阴疽,治疗常用
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单选题热扰神明者出现呕吐的特点是( )(2009年第18题)
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单选题牙龈红肿疼痛,出血鲜红,多属
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单选题肾虚腰痛日久不愈,无明显阴阳偏虚者,选用下列何种方剂为宜
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单选题A.蠲痹汤B.双合汤C.薏苡仁汤D.防风汤
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单选题阴阳学说用于分析四诊资料时,脉象分阴阳,中如以部位分,寸为,尺为;以动态分,则至者为,去者为
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