单选题Arthus反应是

单选题溶组织内阿米巴滋养体对组织的破坏主要通过

单选题下述哪种激素的受体属于G蛋白偶联受体

单选题不属于恶性肿瘤的是

单选题不符合含铁血黄素的描述是

单选题儿童多见的非霍奇金淋巴瘤是

单选题下述哪项可减少静脉回流

单选题女性，40岁，因胆囊结石行胆囊切除术，术后第5天，出现右小腿肿胀、凹陷性水肿，腓肠肌压痛。诊断为右下肢深静脉血栓形成。深静脉血栓是

单选题小肠特有的主要以环行肌舒缩为主的节律性运动形式是

单选题阿米巴痢疾最常见的肠外合并症为（ ）

单选题关于栓塞的叙述，哪项是正确的?

单选题下列不属于化生的是

单选题血浆与组织液各种成分浓度的主要区别是

单选题减压病病人血液中气泡的主要成分为（ ）

单选题 精囊腺的原发性恶性肿瘤中，最常见的是：（ ） A、平滑肌肉瘤 B、导管腺癌 C、黏液性腺癌 D、脂肪肉瘤 E、乳头状腺癌

单选题关于主动脉粥样硬化的描述，错误的是

单选题下述关于各型肝炎细胞坏死程度的描述中，哪项是错误的

单选题患者男性，60岁，1年来进行性吞咽困难，日渐加重。胃镜检查，食管中段可见一溃疡型肿物，质地较硬，溃疡周边隆起，底部凹凸不平。活检的病理诊断最可能是

单选题The collapse of Enron, the largest bankruptcy in American history, has rung out a banner year for American business failures. In Europe, the fallout from the Swissair and Sabena insolvencies continues. In the current global slump, more companies are likely to go under. Now is a perfect time to reconsider how to handle such failures: let them sink, or give them a chance to swim? In America, bankruptcy has come to mean a second chance for bust businesses. The famous "Chapter 11" law aims to give a company time to get back on its feet, by shielding it from debt payments and prodding banks to negotiate with their debtor. It even allows an insolvent company to receive fresh finance after it goes bust. On the other side of the Atlantic, when companies stumble, almost as much effort is spent in fingering the guilty as in trying to salvage a viable business. British and French laws, for example, can make a failing company's directors face criminal penalties and personal liability. Moreover, bankers have the power, at the first sign of trouble, to push a company into the arms of the receivers. Some modest changes are afoot, however. Britain is considering moves that would bring its rules closer to America's. New laws in Germany should also make it easier to revive sick companies, although trade unions still have their say. But even with the arrival of the euro and moves towards a single financial market, going bust in Europe is a strictly local affair. Long before America had a single currency, the American constitution provided uniform bankruptcy laws, observes Elizabeth Warren of the Harvard Law School. Europe's patchwork of national laws, according to Bill Brandt of " Development Specialists", a consultancy, inhibits lending and makes it difficult to fix ailing firms. Transatlantic insolvencies are even harder, as a Belgian-based software company, Lernout and Hauspie, discovered this year. Its American reorganization plan was thwarted by a Belgian judge, who ordered a sale of the firm's assets. As the European Union inches toward greater harmonization, should it try to mimic America? Critics of Chapter 11 think not. They argue that America's bankruptcy system is wasteful, lets failed managers go unpunished, and gives some companies an unfair advantage. In Chapter 11, admittedly, lawyers and advisers gobble up fees, but a recent study argues that the fees are no larger than those for most mergers and acquisitions. One common complaint, that managers enjoy the high life while creditors go begging, fails to stand up to the data from America's previous wave of bankruptcies in the early 1990s. Stuart Gilson of the Harvard Business School found that more than two-thirds of top managers were ousted within two years of a bankruptcy filing. More troubling is that some American firms seem to enjoy second and third trips to bankruptcy court, cheekily termed Chapters 22 and 33. Some see this as evidence that, ton often, they use Chapter 11 to keep running. But there is more to the story.

单选题下列情况中，呼吸商变小的是