以下4种select case语句，当x=6时，能输出f的程序段是A.Select Case x
Case 10 To 1Print "f"B.Select Case x
Case Is > 6, 1, 5 To 10Print "f"C.Select Case x
Case Is > 6, Is < 6Print "f"D.Select Case x
Case 1, 5, Is > 6Print "f"答案是B，为什么呢？
