高渗性脱水()。 ["急性绞窄性肠梗阻","长期胃肠减压","中暑","婴儿手足抽搐","长期营养肠造瘘病儿"]
女,50岁,无明显诱因的腰部慢性疼痛1个月,休息后好转,但活动过久疼痛加剧,不发热,双下肢无放射痛,腰椎旁有压痛。依据临床症状、体征,其最可能是下列哪项诊断?() ["肾、输尿管结石","强直性脊柱炎","腰椎结核","腰肌劳损","腰椎间盘突出症"]
X线检查对于骨折的重要意义是() ["了解骨质密度","明确骨折的诊断","判断骨折的预后","了解组织的损伤情况","说明骨折的发生机制"]
人体内嘌呤核苷酸分解的终产物是()。 ["尿素","尿酸","肌酸","肌酐","甘氨酸"]
男孩,13岁。生后左足背有皮疹,持续不退,并逐渐向上发展。就医时发现左足背至左大腿内侧线状褐色皮损,表面角化,疣状。组织病理最可能的表现为() ["角化亢进,乳头瘤样增生","真皮浅层带状淋巴细胞浸润","脂膜炎","表皮萎缩","表皮下水疱"]
品种群体的变异来源有哪些?