单项选择题
A.Len(x) B.Str(x) C.Val(x) D.Sqr(x)
A.3 和3 B.4 和4 C.3 和4 D.4 和3
A.i *j = 9 B.1 * 9 = 9 C.i * j =i *j D. 9
A.Dim x As Integer B.Dim x As Integer,y As Single C.Var x,y:Integer D.Dim x As Integer,y As Integer
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