可以通过测定液态食品的相对密度来检验食品的纯度或浓度。
参考答案：对
女婴足月顺产，出生体重3200g，生后48h血清总胆红素297.5μmol/L在检查黄疸原因尚未明确诊断时，首选治疗方法是
A．光照疗法
B．换血
C．口服苯巴比妥
D．白蛋白输注
E．输血浆
These two words are different _______ each other in spelling while they are similar ______ each other in pronunciation.
A．from; to
B．from; as
C．with; like
D．with; to
