小剂量阿司匹林预防血栓形成的机制是() ["抑制磷脂酶","抑制TXA的合成","减少PGI的合成","抑制凝血酶原","减少花生四烯酸的合成"]
肝癌() ["起病急骤严重,中毒症状明显","起病后不久即发生中毒性休克","肿大的肝脏表面有不规则结节","病程较长,偶有发热、腹泻","突发右上腹剧痛,发热可伴有黄疸"]
适用于多品种定型产品的有效生产系统是() ["大量生产","成批生产","单件小批量生产","流水线生产"]
正常人血氨的主要来源是() ["蛋白质腐败","氨基酸脱氨","胺类物质分解","肾小管谷氨酰胺水解","肠道细菌脲酶使尿素分解"]
许多学者认为()目前为止是所有评价方法中最盛行的一种评价方法。 ["排序法","评分法","职位分类法","要素比较法"]
现状调查