梁和桁架预装配时的设计要求起拱允差为±（）。 ["1\/2500","1\/2000","1\/1500","1\/1000"]
You discover that the schema changes that were recently made to your SQL Server 2005 database have caused your Web site to stop functioning. It is unclear who made the changes. TestKing.com now mandates that all changes to the database schema be tracked. You need to implement a mechanism that will track schema changes in your database. What should you do？（） ["Implement a stored procedure that writes data about schema changes to a log table.","Implement DDL AFTER triggers that write user and schema information to a log table.","Implement a DML INSTEAD OF trigger that writes data about schema changes to a log table.","Implement a DML AFTER trigger that writes data about schema changes to a log table."]
由于事故原因的多样性及复杂性，在一定条件下可能发生也可能不发生。这种特性称为事故的（） ["因果性","偶然性","必然性","潜在性"]
劳动权是一项属于每一个人的单独权利，同时也是一项集体权利，因此又可以分为个人劳动权和（）。 ["就业权","获取劳动报酬权","劳动安全权","集体劳动权"]
产品分销渠道的类型有独家分销、选择分销和（） ["联合分销","密集分销","区域分销","许可分销"]
有人认为，对于某一固定的纯度标准规定值来说，小区种植鉴定的株数越少，相应得容许误差值也就越大，鉴定结果也就越容易被判定为合格。请你谈谈对这个观点的看法。
