创伤后留置尿管的目的不是()。 ["尿道损伤后作支架","诊断尿道或膀胱损伤","观察每小时尿量,作为补液的依据","观察休克变化","将膀胱内的血凝块引出"]
为提高混凝土的抗渗能力,可采用()手段。 ["A、提高混凝土的强度等级","B、提高砂率","C、采用高密度骨料","D、掺加引气剂","E、减少水化热"]
易发生DIC的白血病是() ["ALL-12","AML-M1","AML-M5","AML-M3","CML-BC"]
口外支抗类矫治器支抗部件不包括下列哪项() ["颈带","头帽","颏兜","面具和面架","橡皮圈"]
血吸虫病的基本病理变化是() ["尾蚴性皮炎","嗜酸性粒细胞增多","肝脾肿大","虫卵肉芽肿","静脉炎和静脉周围炎"]
为什么液体的黏度随温度的升高而减小,气体的黏度随温度的升高而增加?