粪便隐血试验(化学法)时,患者最好素食() ["2天","3天","4天","5天","6天"]
NaAc强烈水解,下列推断有错误的是()。 ["溶液中[OH-]≈[HAC]","溶液中[H+]相对于[HAC]太少","在平衡体系中不包括水的电离平衡","水溶液中滴入酚酞显红色"]
测定次数一定时,置信度越高,则平均值的置信区间:() ["越宽","越窄","不变","不一定","以上都不正确"]
关于乳剂的不稳定性问题,可逆的现象是() ["乳剂的分层","乳剂的破裂","乳剂的转相","乳剂的合并","乳剂的酸败"]
索偿行
宽带CDMA