AST存在于肝细胞的() ["高尔基小体","内质网","核糖体","细胞浆","线粒体"]
中包覆盖剂的作用是什么?
脑血栓形成多发生于() ["大脑前动脉","椎动脉","颈内动脉系统","基底动脉","后交通动脉"]
产生肝肺综合征的根本原因是() ["贫血","肺内毛细血管扩张","肺通气功能下降","内毒素进入肺循环","呼吸道黏膜水肿"]
下列哪项描述不是恶性肿瘤的特点() ["通常分化不成熟,多为异型及幼稚细胞","核分裂常见,并可见不典型的核分裂象","侵袭性生长,边界不清","易发生转移","常有包膜"]
铝合金门窗、塑料门窗制作安装工程量均按()计算。