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This is a purely _______ problem, not a political one. A. additional B. assiduous C. adamant D. academic [academic] academic adj.学术的、理论的 [/academic] [additional] additional 额外的、附加的 additive 添加剂 addendum 补充、附录 adder 蝰蛇 deaf as an adder 充耳不闻 [/additional] [assiduous] assiduous 勤奋的、好学的 insidious 阴险的、狡诈的 preside 主持 consider 考虑 [/assiduous] [adamant] adamant 固执的 | 
