单选题左心衰竭主要引起 A．肺淤血水肿 B．脾淤血水肿 C．肝淤血肿大 D．脑淤血水肿 E．肾淤血水肿
单选题下列哪一种激素属于类固醇激素( ) A．肾上腺素 B．甲状腺激素 C．促肾上腺皮质激素 D．孕激素
单选题胸膜腔内负压的形成主要是由于
单选题对脂肪和蛋白质的消化作用最强的是( ) A．胃液 B．胆汁 C．胰液 D．小肠液
单选题A．核糖体A位 B．核糖体P位C．核糖体E位 D．核糖体C位E．核糖体G位
单选题患者女性，50岁，急性腹痛入院。既往有高血压病史。查体：血压90／50mmHg，四肢温度低，肢端色苍白、腹部无明显包块，无腹肌紧张及反跳痛。超声诊断为主动脉夹层瘤。可导致主动脉夹层瘤的是
单选题类风湿性关节炎较具特异性的自身抗体是( )(2006年)
单选题在环境温度低于30℃，机体处于安静状态下的主要散热方式是( )(2002年)
单选题40岁女性乳腺包块，质硬，边境不清，一侧腋窝淋巴结肿大，乳腺包块病理活检，乳腺小叶和导管消失，异型细胞呈片块状分布，间质少，最可能的诊断为 A．乳腺腺瘤 B．乳腺硬癌 C．乳腺纤维腺瘤 D．乳腺髓样癌 E．乳腺纤维瘤
单选题声音传入内耳的主要途径是( ) A．颅骨→耳 B．外耳→鼓膜→鼓室空气→圆窗→内耳 C．外耳→鼓膜→听骨链→内耳 D．外耳→鼓膜→听骨链→前庭窗→内耳 E．外耳→鼓膜→鼓室空气→前庭窗→内耳
单选题骨化性肌炎，在肌肉组织内出现骨组织，称为( )(1997年)
单选题影响心肌传导性的因素有( ) A．心肌细胞的直径 B．邻近部位膜的兴奋性 C．Na+通道状态 D．A+B E．A+B+C
单选题生理情况下，肾小球的滤过分数约为( )(2006年)
单选题兴奋性与抑制性突触后电位相同点是( ) A．突触后膜膜电位去极化 B．是递质使后膜对某些离子通透性改变的结果 C．都与后膜对Na+通透陛增加有关 D．出现“全或无”式电位变化 E．都可向远端传导
单选题患者男性，59岁。慢性肝炎病史20年。近3年来双下肢浮肿。因消化道出血急诊入院。巩膜黄染，皮肤蜘蛛痣，腹水(＋)。脾肋缘下3cm。符合该患者疾病的诊断是
单选题大多数可兴奋细胞接受刺激发生反应的共同表现是产生
单选题最能反映血液中红细胞和血浆相对数量变化的指标是
单选题The housing market has been for two years propping up consumers' spirits while the rest of the economy lies exhausted on the floor, still trying to struggle to its feet. According to the National Association of Realtors, the national median existing-home price ended the year at $164,000, up 7.1 percent from 2001. That's the strongest annual increase since 1980. Although residential real estate activity makes up less than 8% of total U. S. GDP, a housing market like this one can make the difference between positive and negative growth. Most significantly, consumer spending is 66% of GDP, and the purchase of a new home tends to have an "umbrella effect" on the homeowner's spending as he has to stock it with a washer/ dryer, a new big-screen TV, and maybe a swing set for the yard. The main factor in housing's continued strength is a classic economic example of zero-sum boom: the persistent weakness everywhere else. As the 2003 recovery continues to be more forecast than reality. Falling stock prices raised investor appeal for U. S. Treasury Bonds, which in turn, allowed most interest rates to drift even lower. But there are not many signs that there's a bubble ready to burst. December's new record in housing starts, for example, was nicely matched by the new record in new home sales. If you build it, they will buy and even if an economic pickup starts to reduce housing's relative attractiveness, there's no reason why modest economic growth and improved consumer mood can't help sustaining housing's strength. "The momentum gained from low mortgage interest rates will carry strong home sales into 2003, with an improving economy offsetting modestly higher mortgage interest rates as the year progresses," said David Lereah, chief economist at the National Association of Realtors. Just as housing has taken up much of the economic slack for the past two years, both as a comforting investment for fretting consumers and a driver of consumer spending itself, a big bump elsewhere in the economy in 2003 could be housing's downfall. If stocks roar back this spring, capital inflows could steal from the bond market, pushing up long-term interest rates. Or Alan Greenspan and the Fed could do the same to short-term rates, as a way to hit the brakes on a recovery that is heating up too fast. In other words, if everything possible goes wrong for housing, homeowners should have plenty to compensate them in terms bf job security and income hikes.
单选题A．支原体B．噬菌体C．细菌D．酵母
单选题下列不符合浆液性炎的描述是