单选题靛氰绿滞留率试验用于鉴别

单选题Litten现象是指

单选题关于手部畸形的临床意义，错误的是

单选题血清中哪种物质增加提示早期肝硬化

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．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

单选题腰大肌征阳性提示阑尾是

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.

单选题能较早判断肾小球损害的检查是

单选题以下对于大气道狭窄性质判定的V-V环表现，错误的是

单选题AustinFlint杂音和二尖瓣狭窄舒张期杂音的主要辨别点在于

单选题Galloway, a mostly middle-class community northwest of Atlantic City, is part of a wave of districts across the nation trying to remake homework amid concerns that high-stakes testing and competition for college have fueled a nightly grind that is stressing out children and depriving them of play and rest, yet doing little to raise achievement, particularly in elementary grades. Such efforts have drawn criticism from some teachers and some parents who counter that students must study more, not less, if they are to succeed. Even so, the anti-homework movement has been reignited in recent months by the documentary Race to Nowhere, about burned-out students caught in a pressure-cooker educational system. "There is simply no proof that most homework as we know it improves school performance," said Vicki Abeles, the filmmaker and a mother of three from California. "And by expecting kids to work a 'second shift' in what should be their downtime, the presence of schoolwork at home is negatively affecting the health of our young people and the quality of family time. " So teachers at Mango Elementary School in Fontana, Calif., are replacing homework with "goal work" that is specific to individual student's needs and that can be completed in class or at home at his or her own pace. The Brooklyn School of Inquiry, a gifted and talented program, has made homework optional. "I think people confuse homework with rigor," said Donna Taylor, the Brooklyn School's principal, who views homework for children under 11 as primarily benefiting parents by helping them feel connected to the classroom. Research has long suggested that homework in small doses can reinforce basic skills and help young children develop study habits, but that there are diminishing returns. Still, efforts to roll back homework have been opposed by those who counter that there is not enough time in the school day to cover required topics and that homework reinforces classroom learning. In Coronado, Calif. , the school board rejected a proposal by the superintendent to eliminate homework on weekends and holidays after some parents said that was when they had time to help their children and others worried it would result in more homework on weeknights. Homework wars have divided communities for over a century. In the 1950s, the Sputnik launching ushered in heavier workloads for American students in the race to keep up with the Soviet Union. The 1983 report "A Nation at Risk" and, more recently, the testing pressures of the No Child Left Behind law, also resulted in more homework for children at younger ages. A few public and private schools have renounced homework in recent years, but most have sought a middle ground. In Galloway, the policy would stipulate that homework cover only topics already addressed in class. Dr. Giaquinto, Galloway's superintendent, said the goal of the proposed policy was to make homework "meaningful and manageable," noting that teachers would have to coordinate assignments so that a student's total homework would not exceed the time limit.

单选题网织红细胞明显增多见于

单选题女，45岁，查外周血Hb90g／L，RBC2．85×10 12 ／L。外周血涂片靶形红细胞占26％，本例诊断为

单选题关于Litten现象的叙述，不正确的是

单选题湿罗音满布双肺野多见于

单选题诊断急性肝炎或慢性肝炎活动期最敏感的试验项日是