LG-35T、50T螺旋千斤顶的构造?
川崎病的易发年龄组是() ["新生儿","1岁以内","3岁以内","3~10岁","10岁以上"]
造成光纤通信系统出现误码告警,通信质量下降的原因有() ["A.光纤中断","B.光缆在敷设和接续过程中造成光纤的损伤使线路衰耗时小时大,活动连接器未到位或者出现轻微污染","C.光纤受侧应力作用或光纤在某些特殊点受压(如收容盘内压纤)等,全程衰耗增大","D.光缆接头盒进水"]
容易造成视力障碍的儿童类风湿病类型是() ["全身型","多关节型,类风湿因子阳性","多关节型,类风湿因子阴性","少关节型","以上都是"]
鉴别肾上腺皮质功能亢进的病因(增生或腺瘤)时,常选用() ["ACTH兴奋试验","小剂量地塞米松抑制试验","大剂量地塞米松抑制试验","GH葡萄糖抑制试验","过夜地塞米松抑制试验"]
车辆在两钢轨间脱轨的起复方法?