【单选题】在分类检索语言中,是用 和类目名称(分类词或分类名)来表达各种事物概念,并将它们按学科范畴和等级体系来排列。
【多选题】Why do most of us feel anxious when speaking in public?
B.
Lack of experience of pulic speaking.
C.
Being reluctant to be the center of attention.
D.
Being afraid of not being good enough with the speech.
【简答题】Why do most Chinese students prefer to study in the US?
【单选题】在平面直角坐标系中,如果⊙O是以原点为圆心,以10为半径的圆,那么点A(-6,8)