百度试题 结果1 题目Cau 3. Gia tri tuyet doi cua -1. 5 la A. 1.5 B. -1,5. C. 2. D. -2 相关知识点: 试题来源: 解析 AVinên. 反馈 收藏
Nhận xét rằng:Do đó, để bỏ được dấu giá trị tuyệt đối của, ta cần xét các trường hợp:Truoòng hơp 1: Nếu, ta được:Truoòng hợp 2: Nếu, ta được:Thờng hợp 3: Nếu, t...
Sara,Kenis,Matthias,D'hooghe,Guido,Verniest,Vinh,Duc,Nguyen,Tuyet 摘要: An efficient and straightforward approach towards the synthesis of 1-alkyl-2-(trifluoromethyl)aziridines starting from 1,1,1-trifluoroacetone via imination, α-chlorination, hydride reduction and ring closure was developed. ...
membranes Article Application of PolyHIPE Membrane with Tricaprylmethylammonium Chloride for Cr(VI) Ion Separation: Parameters and Mechanism of Transport Relating to the Pore Structure Jyh-Herng Chen 1,*, Thi Tuyet Mai Le 2 and Kai-Chung Hsu 2 1 Department of Materials and Mineral Resources ...