负责组织A类和B类业余无线电台所需操作技术能力的验证的机构是：（）
A
暂无解析
Well-arrangedsentencesareconsideredgrammaticalsentencesthatareformedfollowingasetofsyntacticrules.
Ingrammaticalcontext,themeaningofawordmaybeinfluencedbythe______inwhichitoccurs.
EmpiricalstudiesshowthattheprocessofSLAisaprocessofconstructingandmodifyingrulesofcommunication.