每根线由文本和数字组成的编码来识别,由2位字母后跟2位数字构成。
A.Each wire is comprised by an alphabetical code following 2 alpha digits and 2numerical digits. B.Each wire is identified by an alphanumerical code comprising 2 alpha digits followed by 2 numerical digits. C.. Each wire consists of an alphanumerical code following 2 alpha digits and 2numerical digits.正确答案B