滚动轴承代号中，自右至左第一、二位数字是表示轴承的（），其计算方法是该数（）。
You are maintaining the SALES database of a company. You have never backed up the USERS tablespace that is currently offline. On Sunday， you issued the following commands： CONFIGURE DEFAULT DEVICE TYPE TO sbt； CONFIGURE BACKUP OPTIMIZATION ON； CONFIGURE RETENTION POLICY TO REDUNDANCY 3； From Monday to Saturday， you performed the following actions： Day Action Monday BACKUP DATABASE Tuesday BACKUP DATABASE Wednesday BACKUP DATABASE Thursday BACKUP DATABASE Friday BACKUP DATABASE Saturday BACKUP DATABASE How many times will the backup of the USERS tablespace be performed？（） The backup will not be performed at all.。 three times。 four times。 six time。
某企业的预期年收益为30万元，该企业的各单项资产的评估值之和为90万元，企业所在的行业的平均收益率为20%，并以此作为使用的资产收益率，则据此评估商誉的价值为（）。 20。 30。 50。 60。
You plan to move data from a flat file to a table in your database. You decide to use SQL*Loader directpath load method to perform this task. The table in which you plan to load data is an important tablehaving various integrity constraints defined on it. Which constraints will remain enabled by default during this operation（） CHECK。 UNIQUE。 NOT NULL。 PRIMARY KEY。 FOREIGN KEY。
营养级
You deployed a Java EE Shared Library and want to use it from an application that is also deployed on the same cluster.
Which two manifest attributes must be specified at a minimum with corresponding values in the deployment descriptor of the application that requires?（）
