一30岁男性建筑工人,不慎从约3米高处跌下,骑跨于铁栏杆上,伤后尿道流血,会阴皮肤青紫肿痛,此伤员最大的可能是() ["膀胱破裂","前列腺尿道损伤","膜尿道损伤","球尿道损伤","阴茎部尿道损伤"]
生物膜按质量计,含量最多的成分是()。 ["蛋白质","磷脂","胆固醇","糖脂","三酰甘油"]
喷涂工序中最重要的是下列哪道工序:() ["脱脂","水洗","磷化","打磨抛光"]
国标规定,双硫腙比色法测锌时,用什么试剂防止铜、汞、铅、铋与镉离子的干扰?() ["硫代硫酸钠溶液,用乙酸调至pH4.5~5.5","碘化钾溶液","氯化钠溶液","氯化亚锡溶液","亚硫酸钠溶液"]
做跌落测试时,重量为10Kg的货物跌落高度是:(). ["76.5cm","61cm","50cm","45.7cm"]
怎样做好运动场草坪的管理?