单项选择题
A.逗号“，” B.冒号“：” C.双斜线“//” D.分号“；”
A.SqlConnection B.SqlDataAdapte R.C.SqlCommand D.SqlTransaction
A.ExecuteNonQuery B.ExecuteReader C.ExecuteScalar D.ExecuteXmlReader
A.Required Field Validator B.Range Validator C.Compare Validator D.Regular Expression Validator
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