题目

下列数轴中阴影部分的表达式是（   ）。 A . ( x < = a ) and (( x > = b ) and ( x < c )) B . ( x < = a ) and (( x > = b ) or ( x < c )) C . ( x < = a ) or (( x > = b ) and ( x < c )) D . ( x < = a) or (( x > = b ) or ( x < c )) 答案：A

查看本题答案和解析