【单选题】有一个晶体管的型号是3AG54A,该晶体管是____,晶体管的材料是____,该晶体管的类型是____。
【简答题】By the position of the _____ part of the tongue, vowels are classified as front vowels, central vowels and back vowels.
【简答题】In English, all the front vowels and central vowels are ___________ vowels.
【判断题】In English, all the front vowels and the central vowels are unrounded.
【简答题】What are central vowels?
【多选题】商业区域中的混合区,其可分为( )等,混合区具备单一商圈形态的消费特色,一个商圈内往往含有多种商圈类型,属于多元化的消费习性。
【简答题】By the ____ cavity of the highest part of the tongue,vowels are classified as front vowels, central vowels and back vowels.
【多选题】施工现场质量管理检查记录的检查项目的划分有: