Suppose a structure is created with the code Structure stateUSA Dim city As String Dim yearFounded As Integer End Structure in the Declarations section of the Code window. In this structure, the variable city is known as a member.
A.
正确
B.
错误
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举一反三
【简答题】设等差数列 的前 项和为 ,已知 ,且 ,则下列结论中正确的有 .(填序号) ①此数列的公差 ; ② ; ③ 是数列 的最大项; ④ 是数列 中的最小项.