单选题维持机体稳态的重要调节过程是( ) A．神经调节 B．体液调节 C．自身调节 D．负反馈调节 E．旁分泌调节

单选题由受控部分传到控制部分的信息，称为( ) A．反馈 B．反馈信息 C．正反馈 D．负反馈 E．前馈

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)

单选题与视杆细胞相比，视锥细胞功能的最重要特点是( ) A．能合成感光色素 B．能产生感受器电位 C．含有11-顺视黄醛 D．具有辨别颜色的能力 E．对光刺激敏感

单选题妊娠3个月后，诊断死胎的化验指标是孕妇尿中的( ) A．雌酮突然减少 B．孕酮突然减少 C．雌二醇突然减少 D．雌三醇突然减少 E．绒毛膜促性腺激素突然减少

单选题 呼吸性碱中毒情况不见于 ( ) A、大气氧分压过低 B、人工呼吸时过度通气 C、长时间在密闭小室中 D、癔病发作 E、革兰阴性杆菌败血症

单选题弥漫性膜增生性肾小球肾炎的病理特点是

单选题导致空气栓塞的是

单选题属于负反馈调节的过程见于( )(2003年)

单选题临床上，乙型血友病是由于缺乏

单选题A.以激素调节为主B.以神经调节为主C.以代谢产物调节为主D.受下丘脑和靶腺激素的双重调节

单选题A．有活性 B．无活性 C．两者都是 D．两者都非

单选题绒毛膜癌最常转移到

单选题下列不符合TNF的描述是

单选题 以下哪种因素导致血中儿茶酚胺类激素浓度升高？（ ） A、血糖升高 B、恐惧、焦虑和剧痛 C、慢波睡眠期 D、血压升高 E、机体清醒安静

单选题Ca2+通过细胞膜的转运方式主要为 A.单纯扩散和易化扩散 B.易化扩散和主动转运 C.单纯扩散和主动转运 D.易化扩散和出胞

单选题肺梗死形成的先决条件是

单选题 下述关于艾滋病(AIDS)的说法，哪一点是错误的? ( ) A、其病因是人类免疫缺陷病毒 B、最多见于同性恋者 C、可由输注血液制品引起 D、属于原发性免疫缺陷病 E、艾滋病病人的细胞免疫功能低下