属于次生苷的化合物是() ["A.柴胡皂苷a","B.甘草酸","C.人参皂苷R0<\/sub>","D.甘草次酸","E.柴胡皂苷b1<\/sub>"]
考古报告的体例设计
银行卡按币种分为()、双币种卡和多币种卡。 ["A、商务卡","B、VISA卡","C、万事达卡","D、单币卡"]
试剂为三氯乙酸的反应是() ["A.Liebermann-Burchard反应","B.Kahlenberg反应","C.Rosen-Heimer反应","D.Salkowski反应","E.Tschugaeff反应"]
熊果酸属于() ["A.羊毛脂甾烷型","B.达玛烷型","C.齐墩果烷型","D.乌苏烷型","E.羽扇豆烷型"]
考古学在我国历史研究中的作用