人体维生素B1缺乏时,红细胞转酮醇酶活力及TPP效应的变化应是() ["转酮醇酶活力及TPP效应均降低","转酮醇酶活力及TPP效应均增高","转酮醇酶活力降低,TPP效应增高","转酮醇酶活力增高,TPP效应降低","以上都不对"]
水溶性维生素摄入过多时() ["可在体内大量贮存","可经尿液排出体外","极易引起中毒","通过胆汁缓慢排出体外","通过汗腺排出体外"]
组成低聚糖的单糖分子数为() ["1~2个","3~8个","11~15个","16~20个","20~25个"]
一般食物的含氮量转换为蛋白质含量的系数为() ["5.85","6.05","6.25","6.45","6.15"]
急性失血时血象最早的变化是() ["血小板减少","血红蛋白减少","白细胞升高","白细胞减少","血小板减少增高"]
结核菌素试验阴性反应有何意义?