[填空题] 学生的某次课程测验中,选择题的答案已记录在列表框list1中,其数据行格式是:学号为6个字符长度,2个空格,选择题的答案为15个字符长度,程序根据标准答案进行批改,每答对一题给1分,并将得分存放到列表框list1中,标准答案存放在变量Exact中。Option ExplicitPrivate Sub Command1_click()Dim Anw as string , StudId as stringDim Scor as Integer, Exact as stringDim I as Integer, J as integerExact=”ABCCBAACBBDCCDA”For I=()Anw=()StudId=Left(Anw,6)Anw=Right(Anw,Len(Anw)-8)()For J=1 to Len(Anw)If () ThenScor=Scor+1End IfNext JList2.AddItem StudId & “ “ & ScorNext IEnd Sub