下列哪项不是学校突发事件() ["传染病暴发疫情","食品污染中毒","饮水与环境污染","集体药物不良反应","某班1个学生患感冒"]
石菖蒲中柱维管束呈() ["周木型和周韧型","周韧型和双韧型","双韧型和外韧型","外韧型和周木型","周木型和双韧型"]
气雾剂充填抛射剂的方法有() ["冷灌法","热压法","压灌法","减压法","水灌法"]
震后被埋压时求生的对策是()。 ["不停地呼救","不顾一切的行动","精神崩溃,惊慌失措","保存体力,寻找脱险捷径"]
川贝母表皮细胞垂周壁() ["角质化","平直","连珠状增厚","波状弯曲","木栓化"]
试述131I治疗甲状腺功能亢进症的适应证和禁忌证。