单选题四肢对称性紫癜伴有关节痛、腹痛、血尿者的是

单选题正常AG代谢性酸中毒见于

单选题心尖搏动向左而不向下移位最常见于

单选题下列哪种情况可见到尿比重增高

单选题移动性浊音阳性提示腹水量至少为

单选题A．肾上腺皮质功能减退B．Cullen征C．多发性神经纤维瘤D．Grey-Turner征

单选题面神经受损不会出现下列哪项症状

单选题pH7．256，PaO 2 55mmHg，PaCO 2 56mmHg，HCO 3 - 24mmol／L，该患者的酸碱失衡类型为

单选题关于手部畸形的临床意义，错误的是

单选题靛氰绿滞留率试验用于鉴别

单选题患者，女，30岁，头痛、发热、呕吐3天入院。查体：T39℃。血压110／80mmHg，瞳孔等大等圆，对光反射存在。颈项强直，心肺无异常发现。腰穿脑脊液检查：稍浑浊，Pandy试验阳性，葡萄糖4．0mmol／L，氯化物128mmol／L，细胞计数45×10 6 ／L，N36％，L64％。最可能的诊断是

单选题血清中哪种物质增加提示早期肝硬化

单选题A．P波增宽，有切迹 B．P波高耸C．可见逆行P波 D．可见异位P波E．P与QRS无关

单选题腰大肌征阳性提示阑尾是

单选题Litten现象是指

单选题关于黄疸的叙述，正确的是

单选题肺部叩诊呈浊音常见于

单选题A．瞳孔缩小B．瞳孔扩大C．瞳孔大小不等D．瞳孔对光反射消失E．瞳孔集合反射消失

单选题A．室性期前收缩 B．室内传导阻滞C．预激综合征 D．右室肥大E．心肌梗死

单选题Even plants can run a fever, especially when they are under attack by insects or disease. But (1) humans, plants can have their temperature (2) from 3,000 feet away—straight up. A decade ago, (3) the infrared scanning technology developed for military purpose and other satellites, physicist Stephen Paley (4) a quick way to take the temperature of crops to determine (5) ones are under stress. The goal was to let farmer (6) target pesticide spraying (7) rain poison on a whole field, which (8) include plants that don't have the pest problem. Even better, Paley's Remote Scanning Services Company could detect crop problem before they became (9) to the eye. Mounted on a plane flown at 3,000 feet (10) , an infrared scanner measured the heat emitted by crops. The data were (11) into a color-coded map showing (12) plants were running "fevers". Farmers could then spot spray, using 50 to 70 percent less pesticide than they (13) would. The bad news is that Paley's company closed down in 1984, after only three years. Farmers (14) the new technology and long-term backers were hard (15) . But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to (16) into operation. Agriculture experts have no doubt about the technology works. "This technique can be used (17) 75 percent of agricultural land in the United States," says George Oerther of Texas A＆M. Ray Jackson, who recently retired from the Department of Agriculture, thinks (18) infrared crop scanning could be adopted by the end of the decade. But (19) Paley finds the financial backing (20) he failed to obtain 10 years ago.