反映食物蛋白质消化吸收程度的指标是() ["蛋白质消化率","生物价","蛋白质净利用率","蛋白质功效比值","氨基酸评分"]
可用于判断甾体皂苷螺缩酮结构的是() ["A.三氯乙酸反应","B.IR光谱","C.茴香醛反应","D.Keller-Kiliani反应","E.UV光谱"]
微量元素在人体中含量不超过体重的() ["0.001%","0.005%","0.01%","0.05%","0.1%"]
Z480一共有哪种颜色?() ["红色red","蓝色blue","金属灰色grey","白色white","粉色pink"]
区别甾体皂苷和C21甾苷可用() ["A.三氯乙酸反应","B.IR光谱","C.茴香醛反应","D.Keller-Kiliani反应","E.UV光谱"]
简述2000年《国际贸易术语解释通则》规定的贸易术语种类。