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单选题以下病变可引起补体下降,除了
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单选题下列关于手术室管理的描述正确的是
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单选题A.急性膀胱炎B.急性肾盂肾炎C.急性前列腺炎D.睾丸扭转E.急性附睾炎
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单选题蛛网膜下腔阻滞麻醉中最常见的并发症是
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单选题男,40岁,因左腰持续胀痛,高热2周入院,体检:T39℃,左腰胀痛,伴肌紧张及叩痛,尿检可见大量脓细胞,考虑左肾脓肿,进一步确诊的辅助检查是
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单选题有关黄色瘤(Xanthoma)的临床表现,下列哪项是错误的( )
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单选题下列关于术后患者的饮食处理,错误的是A.非腹部局麻下的手术,术后即可进食B.非腹部腰麻或硬膜外麻醉下的手术,一般术后2~3天即可进食C.非腹部全麻下的手术,患者清醒,无呕吐时可进食D.择期胃肠道手术,肠蠕动恢复后,可开始饮水,进少量流食E.腹部手术需禁食时间较长者,应给予胃肠外营养
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单选题紧贴肱骨干中、下1/3走行的神经是( )
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单选题抗基底膜型新月体性肾小球肾炎是
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单选题A.第1~2肋B.第2~4肋C.第4~7肋D.第8~10肋
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单选题卧床、无发热或异常消耗的成年男性病人每天最低热卡需要是A.15~20kcaL/kg体重B.25~30kcal/kg体重C.30~50kcal/kg体重D.50~60kcal/kg体重E.75kcal/kg体重
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单选题关于血清淀粉酶的叙述,正确的是
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单选题It may turn out that the "digital divide"--one of the most fashionable political slogans of recent years--is largely fiction. As you will recall, the argument went well beyond the unsurprising notion that the rich would own more computers than the poor. The disturbing part of the theory was that society was dividing itself into groups of technology "haves" and "have-nots" and that this segregation would, in turn, worsen already large economic inequalities. It is this argument that is either untrue or wildly exaggerated. We should always have been suspicious. After all, computers have spread quickly because they have become cheaper to buy and easier to use. Falling prices and skill requirements suggest that the digital divide would spontaneously shrink--and so it has. Now, a new study further discredits the digital divide. The study, by economist David Card of the University of California, Berkeley, challenges the notion that computers have significantly worsened wage inequality. The logic of how this supposedly happens is straightforward: computers raise the demand for high-skilled workers, increasing their wages. Meanwhile, computerization--by automating many routine tasks--reduces the demand for low-skilled workers and, thereby, their wages. The gap between the two widens. Superficially, wage statistics support the theory. Consider the ratio between workers near the top of the wage distribution and those near the bottom. Computerization increased; so did the wage gap. But wait, point out Card and DiNardo. The trouble with blaming computers is that the worsening of inequality occurred primarily in the early 1980s. With computer use growing, the wage gap should have continued to expand, if it was being driven by a shifting demand for skills. Indeed, Card and DiNardo find much detailed evidence that contradicts the theory. They conclude that computerization does not explain "the rise in U.S. wage inequality in the last quarter of the 20th century." The popular perception of computers' impact on wages is hugely overblown. Lots of other influences count for as much, or more. The worsening of wage inequality in the early 1980s, for example, almost certainly reflected the deep 1981--1982 recession and the fall of inflation. Companies found it harder to raise prices. To survive, they concluded that they had to hold down the wages of their least skilled, least mobile and youngest workers. The "digital divide" suggested a simple solution (computers) for a complex problem (poverty). With more computer access, the poor could escape their lot. But computers never were the source of anyone's poverty and, as for escaping, what people do for themselves matters more than what technology can do for them.
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单选题关于甲状腺机能亢进的叙述,下列哪项是错误的( )(1995年)
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单选题创伤后或手术中止血带使用不当导致最严重后果是
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单选题患者,女,45岁。经常头晕、头痛,有时突然晕倒,随后很快清醒,偶有视物不清。检查:压头试验阳性,颈椎侧弯或后伸可加重头晕,双下肢腱反射亢进,脊髓造影有部分梗阻。最可能的诊断是A.椎动脉型颈椎病B.体位性眩晕C.神经根型颈椎病D.梅尼埃征
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单选题原始骨痂形成期一般约需
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单选题伸直型((Colles)骨折典型表现是
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单选题慢性肾衰竭患者常伴贫血的主要原因为
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单选题某青年在运动过程中突发左腰部绞痛、血尿,最大可能是
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