The teacher won't write ________ chalk in the future.
A:in
B:on
C:with
D:by
国家质检总局近日抽检了9家电商平台在售的275批次产品,“TOSHIBA东芝”、“荣事达”、“TCL” 等品牌的19批次电磁炉被检出不合格,存在安全隐患。作为青少年应该( )