长期卧床病人消化系统不会出现以下哪项变化() ["胃肠蠕动减弱,胃内食物排空的速率减慢","食物残渣在肠道内停留时间过长","胃液的分泌减少,食欲下降","产生一定程度的高蛋白血症","易引起排便困难,造成便秘"]
下列各项中与Graves病的发病关系最密切的是()。 ["精神创伤","TRH(促甲状腺激素释放激素)升高","TSH(促甲状腺激素)升高","碘摄入过多","自身免疫"]
小儿无尿是指24小时尿量低于() ["30ml","50ml","80ml","100ml","120ml"]
冠状动脉粥样硬化,最常受累的动脉分支是() ["右冠状动脉主干","左冠状动脉主干","右冠状动脉内旋支","左冠状动脉内旋支","左冠状动脉前降支"]
制动后多长时间肌肉重量下降最明显() ["1~2天","3~4天","5~7天","8~9天","10~12天"]
试述磨床的特点。