【单选题】― Has Jackson finished his work today? ― I have no idea, but he ______ it when I saw him this morning.
【单选题】一So you didn’t say “hello” to him last night? 一Well,I stopped and smiled when I saw him,but he _______me and walked on.
【单选题】—So why didn't you say 'hello' to him yesterday? —Well, I stopped and smiled when I saw him, but he _____ me and walked on. [ ]
【判断题】汇总记账凭证账务处理程序的主要优点在于保持科目之间的相对应关系。
【判断题】由风蚀作用形成的洼地,称风蚀谷。当风蚀作用深达地下水面时,就会有生物生长,形成沙漠中的绿洲。
【多选题】下列方法或过程能获得胺类物质的是
E.
N-烷基邻苯二甲酰亚胺在碱性溶液中加热水解。
F.
N,N-二烷基取代酰 胺被三乙氧基氢化铝锂还原