So what makes them different? Millennials are the first generation to have always__1____ , which has transformed the way people __2____ .I can’t live without my iPhone. I just — I feel naked if I don’t __3_____ .
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A 22-year-old is considered to be part of which generation?People born in the 1980s or ’90s are generally considered to be _________ .
沙丁胺醇氨基上的取代基是
A. 甲基
B. 异丙基
C. 叔丁基
D. 乙基
具有莨菪酸结构的特征定性鉴别反应是
A. 重氮化-偶合反应
B. 氯化铁试液显色反应
C. 坂口反应
D. Vitali反应
关于硫酸阿托品,下列说法不正确的是
A. 现可采用合成法制备
B. 水溶液呈中性
C. 在碱性溶液中较稳定
D. 可用Vitali反应鉴别