起重机吊一个重物升降时，负载的机械特性（）。 恒功率型。 位能型恒转矩。 反抗型恒转矩。 直线型机械特性。
You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=". What happens when the main query is executed? （） The main query executes with the first value returned by the subquery.。 The main query executes with the last value returned by the subquery.。 The main query executes with all the values returned by the subquery.。 The main query fails because the multiple-row subquery cannot be used with the comparison operator.。 You cannot define a multiple-row subquery in the WHERE clause of a SQL query.。
在国际税收关系中，优先适用（）管辖权已经成为各国公认的准则。 A、地域管辖权 。 B、属人管辖权 。 C、居民管辖权 。 D、公民管辖权。
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？（） You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.。 You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.。 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.。 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.。
拉底
监理单位对工程建设过程中所监理的设计与施工质量负监督与控制责任，对其验收合格项目的（）质量负责。
