管道封堵作业时，通过（）来操作夹板阀。 正确。 错误。
You are working on a very large database. You had performed a binary backup of the control file a month ago. After this you added a few tablespaces， and dropped a couple of tablespaces. This morning， due to hardware failure， you lost all your control files. How would you recover the database from this situation？（） 正确。 错误。
成角透视 正确。 错误。
On Monday， you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday， you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct？（） 正确。 错误。
防污染类 正确。 错误。
当图纸与工程量清单所列数量不一致时，以工程量清单所列数量作为报价的依据。
