【简答题】根据维生素的溶解性不同,可将维生素分为两类,即______和______。
【简答题】乙二胺四乙酸是常用的分析试剂,俗名EDTA。其结构简式如下: 在合成EDTA时,最后两步是由乙二胺 跟氯乙酸 在碱性条 件下缩合为乙二胺四乙酸钠,再用盐酸酸化,得到EDTA。现以乙烯为起始有机物以及NH 3 、Cl 2 等无机物,按下图所示合成EDTA。 (1)写出结构简式:A___________,B___________,C___________,D___________,E_________...
【单选题】听力原文:M: What a shame, Nancy. You have been in town for a week, and you don't even think of calling me until you were ready to leave! W: I am sorry, Bob. My schedule is just too tight. Next time I come...
A.
She will find time to meet Bob on her next visit.
B.
She will call Bob when she comes again.
C.
She will visit Bob before she leaves.
D.
She has no interest in chatting with Bob.
【简答题】时尚意义内涵比较 ,并且与其所处的生活语境直接相关。
【单选题】下列不属于商业计划书撰写三阶段法的是( )
【单选题】下列不属于商业计划书撰写三阶段法的是( )
【判断题】财政部是管理国库单一账户体系的职能部门,任何单位不得擅自设立、变更或撤销国库单一账户体系中的各类银行账户。( )