Which three statements are true regarding persistent lightweight jobs？（） Persistent lightweight jobs modify several tables in the data dictionary to generate a lot of redo.。 The user cannot set privileges on persistent lightweight jobs.。 Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time.。 Persistent lightweight jobs are useful when users need to create a small number of jobs that run infrequently.。 The use of a template is mandatory to create persistent lightweight jobs.。
在选用刀具材料时，在保持足够的强度和韧性的条件下，应尽可能有高的（） 硬度。 耐热性。 硬度和耐热性。 硬度和耐磨性。
In your multitenant container database (CDB) containing same pluggable databases (PDBs), you execute the following commands in the root container: Which two statements are true?（） The C # # ROLE1 role is created in the root database and all the PDBs.。 The C # # ROLE1 role is created only in the root database because the container clause is not used.。 Privileges are granted to the C##A_ADMIN user only in the root database.。 Privileges are granted to the C##A_ADMIN user in the root database and all PDBs.。 The statement for granting a role to a user fails because the CONTAINER clause is not used.。
下列符合施工组织总设计的编制程序的是（）。 确定施工的总体部署、拟定施工方案、编制施工总进度计划、编制资源需求量计划。 确定施工的总体部署、拟定施工方案、编制资源需求计划、编制施工总进度计划。 确定施工的总体部署、编制资源需求计划、编制施工总进度计划。 计算主要工种工程的工程量、确定施工的总体部署、编制施工总进度计划、拟定施工方案。
对成功或失败进行归因时，属于稳定的因素有（） 能力。 运气。 努力。 任务难度。
Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:
Which UPDATE statement is valid?（）
