VB中mid(s,1,2)=mid(s,3,

VB中mid(s,1,2)=mid(s,3, 在vb中s=中华人民共和国 表达式left(s,2)+right(s,2)+mid(s,3,2)的值是多少?谢谢! vb中mid的含义 s=s+arr(j,1)*Val(Mid(p,j, mid-1980s是什么意思 mid-1800s Mid$（S,3, her mid-70s VB.net程序编写设a=2,b=3,c=4,d=5,S=ABCDEFGHI]K,求下列表达式的值：(1) 5+(a+b)2 (2)cos(b)(sin(a)+1) (3) 8e3ln2(4) Left(S,4) (5) Mid(S,3,4) (6) Instr(S,EFG) (7)Lcase(Right(S,5)) (8)Len(Mid((S,3) t=t&mid（s,i, 1Dim var2='ABC'为什么不对 2执行语句s=Len(Mid(VisualBa1Dim var2='ABC'为什么不对2执行语句s=Len(Mid(VisualBasic,1,6))后,s的值是(6)求解释3VB考试笔试用把运算符记下来 mid 70s什么意思? mid-1940s怎么译 it s mid autumnday tomorrow She's in her mid in his mid-20's lo_val=mid 1;elseprintf(%s %s ,a,b);,NULL);scanf(%d, 执行语句s=Len(Mid(VisualBasic,1,6))后,s的值是?里面的led ,mid 1 和6 各代表了什么?请问