单选题A．乳头血性溢液B．乳头黄绿色或浆液性溢液C．两者均有D．两者均无

单选题深Ⅱ°烧伤的深度

单选题盆腔位阑尾炎导致的临床症状是

单选题高压蒸气灭菌对灭菌物品的要求为压力104．0～137．3kPa

单选题A．杯口征或弹簧征 B．鸟嘴征 C．铅管征 D．线样征

单选题On the first Earth Day, the U.S. was a poisoned nation. Dense air pollution blanketed cities like Los Angeles, where smog alerts were a fact of life. Dangerous pesticides like DDT were still in use, and water pollution was rampant—symbolized by raging fires on Cleveland's Cuyahoga River. But the green movement that was energized by Earth Day— and the landmark federal actions that followed it—changed much of that. Today air pollution is down significantly in most urban areas, the water is cleaner, and even the Cuyahoga is home to fish again. But if the land is healing, Americans may be sickening. Since World War Ⅱ, production of industrial chemicals has risen rapidly, and the U.S. generates or imports some 19 billion kg of them per day. These aren't the sorts of chemicals that come to mind when we picture pollution—huge plants spilling contaminated wastewater into rivers. Rather, they're the molecules that make good on the old "better living through chemistry" promise, appearing in items like unbreakable baby bottles and big-screen TVs. Those chemicals have a, habit of finding their way out of everyday products and into the environment—and ultimately into living organisms. A recent biomonitoring survey found traces of 212 environmental chemicals in Americans—including toxic metals, pesticides, etc. "It's not the environment that's contaminated so much," says the director of the Cincinnati Children's Environmental Health Center. "It's us." As scientists get better at detecting the chemicals in our bodies, they're discovering that even tiny quantities of toxins can have a potentially serious impact on our health—and our children's future. Chemicals like bisphenol A (BPA) and phthalates—key ingredients in modern plastics—may disrupt the delicate endocrine system. A host of modern ills that have been rising unchecked for a generation—obesity, diabetes, attention-deficit disorder —could have chemical connections. "We don't give environmental exposure the attention it deserves," says Dr. Philip Landrigan. "But there's an emerging understanding that kids are uniquely susceptible to environmental hazards." Washington has been slow to arrive at that conclusion. The Toxic Substances Control Act (TSCA), the 34-year-old vehicle for federal chemical regulation, has generally been a failure. The burden of proving chemicals dangerous falls almost entirely on the government. And the Environmental Protection Agency (EPA) has been able to issue restrictions on only a handful of chemicals and has lacked the power to ban even some dangerous cancer-causing substances. But change is coming. The Obama Administration is taking a closer look at chemicals. More important, Congress may finally be ready to act. "We can't permit this assault on our children's health—and our own health—to continue," says Senator Frank Lautenberg.

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单选题 先天性脑积水行分流术时，脑脊液蛋白质超过多少，堵管的机会明显增加（　　） A、3g／L B、4g／L C、5g／L D、6g／L E、7g／L

单选题双侧瞳孔时大时小变化不定，对光反射消失、伴眼球运动障碍是下列哪种损伤的常见表现（ ）

单选题A．高钾血症 B．低钾血症C．代谢性酸中毒 D．低钙血症E．水中毒

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单选题男，26岁。腰背痛8年，晨起有腰部僵硬感，向臀部和大腿放射，并出现驼背畸形，同时双髋关节活动受限。查体：体温正常，脊柱活动明显受限，Thomas征阳性，“4”字试验阳性。辅助检查：X线示骶髂关节完全融合，相邻椎体形成“竹节样”改变。血液检查(HLA-B 27 )阳性，红细胞沉降率加快，首先考虑的诊断是

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单选题神经损伤后，近端毁损，无法接续者，可进行的治疗方法为