血栓形成多见于()。 ["股动脉","右心房","股静脉","肱静脉","下腔静脉"]
种植性转移特点下列不正确的是()。 ["可见肾种植转移","多见于体腔内脏器官肿瘤","多见肺、肝、卵巢癌","肿瘤细胞脱落","可见胸腹膜种植转移"]
在谷类食物中,B族维生素主要存在于()。 ["蔗糖中","麦芽糖中","膳食纤维中","糊粉和胚芽中","精白面粉"]
成人维生素C的安全摄入量上限为()。 ["60mg/d","500mg/d","2000mg/d","100mg/d","1000mg/d"]
污水消毒后,每升大肠菌群≤500CFU,()采样未检相应致病菌为消毒合格 ["A、连续2次","B、连续3次","C、连续5次","D、隔日3次"]
何谓单方案?何谓单方案评价?单方案评价的作用是什么?