世界银行和亚洲开发银行贷款项目的工程和货物国际竞争性招标的授标原则为（）中标。 ["A.报价最低者 ","B.评标价最低者 ","C.综合得分最高者 ","D.性价比最高者"]
You are developing a Windows Forms application that contains a DataGridView control. The DataGridView capture the customer's name, address, and phone number. You have been asked to provide data validation in a DataGridView to prevent users from leaving the.. You need to ensure that users cannot tab out of the name field without entering data What should you do ?（） [" Validate the name field in the CellValidating event. Set e.Cancel = true if the name field is"," Validate the name field in the CellErrorTextChanged event. Get e.RowIndex if the name field .."," Validate the name field in the CellEnter event. Set the focus on the name field if the name ..."," Validate the name field in the CancelRowEdit event. Set the focus on the name field if the name ..."]
运行记录应（）记录一次。 ["1","2","3"]
在年平均雷电日大于（）天的地区，配电变压器低压侧每相宜装设低压避雷器。 ["10","20","30","40"]
在SQL中，create table为（）数据库中基本表结构的命令。 ["建立","修改","删除","查询"]
职业道德
