单选题下列凝血因子中，需要维生素K参与其合成的是

单选题精子获能发生于( )(2006年)

单选题下列哪项不符合中性粒细胞

单选题化生不发生于( )(2002年)

单选题在细胞膜蛋白质的帮助下，将其他蛋白质分子选择性转运到细胞内的物质转运方式是

单选题主动脉瓣关闭不全的描述中，哪一项是不恰当的

单选题诊断良性肿瘤的组织学依据有

单选题下列肝细胞坏死的病变中，中度慢性肝炎的特征性病理性变化是

单选题环境温度高于皮肤温度时，机体散热的主要方式是

单选题急性肠梗阻行坏死肠管切除肠吻合术后第6天，患者咳嗽后切口内溢出淡红色液体，最可能的原因是

单选题大量嗜酸性粒细胞的渗出可见于

单选题下列哪种激素不是由肾脏合成的

单选题哪项是诊断恶性肿瘤最可靠的依据

单选题Even their parents struggle to draw the tiniest hint of emotion or social connection from autistic(患孤独症的) children, so imagine what happens when a stranger sits with the child for hours to get through the standard IQ test. For 10 of the test's 12 sections, the child must listen and respond to spoken questions. Since for many autistics it is torture to try to engage with someone even on this impersonal level, it's no wonder so many wind up with IQ scores just above a carrot's. More precisely, fully three quarters of autistics are classified as having below-normal intelligence, with many deemed mentally retarded. Researchers have tried a different IQ test, one that requires no social interaction. As they report in the journal Psychological Science, autistic children's scores came out starkly different than on the oral, interactive IQ test — suggesting a burning intelligence inside these kids that educators are failing to uncover. For the study, children took two IQ tests. In the more widely used Wechsler, they tried to arrange and complete pictures, do simple arithmetic, demonstrate vocabulary comprehension and answer questions— almost all in response to a stranger's questions. In the Raven's Progressive Matrices test, they got brief instructions, then went off on their own to analyze three-by-three arrays of geometric designs, with one missing, and choose the design that belonged in the empty place. The disparity in scores was striking. Overall, the autistics scored around the 30th percentile on the Wechsler, which corresponds to "low average" IQ. But they averaged in the 56th percentile on the Raven's. not a single autistic child scored in the "high intelligence" range on the Wechsler; on the Raven's, one third did. Healthy children showed no such disparity. That presents a puzzle. If many autistics arc more intelligent than an IQ test shows, why haven't their parents noticed? Partly because many parents welcome a low score, which brings their child more special services from schools and public agencies. But another force is at work. "We often think of intelligence as what you can show, such as by speaking fluently," says a psychologist. "Parents as well as professionals might be biased to look at that" rather than dig for the hidden intellectual spark. The challenge is to coax that spark into the kind of intelligence that manifests itself in practice. That is something autism researchers are far from doing. Many experts dismiss autistics' exceptional reading, artistic or other abilities as side effects of abnormal brain function. They advise parents to steer their child away from what he excels at and obsesses over, and toward what he struggles with. It makes you wonder how many other children, whose intellectual potential we're too blind to see, we've also given up on.

单选题有关胸膜腔内压的叙述，下列哪项不正确

单选题下列对于高血压病脑出血的描述，不恰当的是

单选题A．每搏输出量B．每分输出量C．射血分数D．心指数E．心脏做功量 (2002年)

单选题弥漫性膜增生性肾小球肾炎的病理特点是

单选题不属于机化的是

单选题导致空气栓塞的是