【单选题】【消耗次数：1】
使用值传递方式将实参传给形参，下列说法正确的是（ ）
①
形参是实参的备份
②
实参是形参的备份
③
形参和实参是同一对象
④
形参和实参无联系
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数组元素作函数实参，向形参传递的是数组元素的[填空1]。
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