(15)设窗体上有一个名称为HS1的水平滚动条,如果执行了语句: HS 1.Value=(HS 1.Max-HS l .Min)/2+HS1.Min则: A)滚动块处于最左端 B)滚动块处于最右端 C) 滚动块处于中间位置 D) 滚动块可能处于任何位置,具体位置取决于Max、Min属性的值
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