[多选] 企业战略体系包括（）等层次。

测试策略的制定是在软件的最终发布期已经确定后才开始进行的，所以测试的进度必须是可测量的。 简述结构化程序设计的要点。 改变矿物组合及工艺性能？ 1405年至1433年，（）率领庞大的船队进行了七次规模巨大的海上远航，途径东南亚各国、印度洋、波斯湾、马尔代夫群岛，最远到达非洲东海岸的索马里和肯尼亚，是哥伦布时代以前世界上规模最大、航程最远的海上探险。 班超。 郑和。 张骞。 蔡伦。 You create a Web Form that displays a GridView. The GridViews data source is a DataSet named dsOrders. The DataSet contains two DataTables named Orders and OrderDetails. You create a relation between the two DataTables using the following code segment. (Line numbers are included for reference only.)01 dtOrders = dsOrders.Tables[“Orders”]; 02 dtOrderDetails = dsOrders.Tables[“OrderDetail”]; 03 colParent = dtOrders.Columns[“OrderID”]; 04 colChild = dtOrderDetails.Columns[“ParentOrderID”]; 05 dsOrders.Relations.Add(“Rell”, colParent, colChild, false); You need to find the cause of the exception being raised in line 05. What should you do? （） Ensure that the child column and the parent column have the same names.。 Ensure that the child table and the parent table have the same names.。 Ensure that the child column and the parent column have the same data types.。 Ensure that each row in the child table has a corresponding row in the parent table.。 Ensure that the tables have an explicit relationship defined by a foreign key constraint in the database.。 企业战略体系包括（）等层次。