Yuri created a formula for a button. The code is supposed to set the value of an existing field called title. He used the following formula: title:= @propercase (title); after the foumula runs ,the title field is null. Why? （） the value of one field cannot be set from the value in another field 。 the text string in the formula is set to null. Thus notes cannot validate the formula 。 when setting the value of a field , the formula must be in the field‟s input validation event 。 the formula does not specify that title is an existing field. Thus it is interpreted as a temporary variable&e。
下列反映资产质量的指标中，哪个指标是通信企业应特别关注的。（） 流动比率。 速动比率。 固定资产周转率。 已获利息倍数。
用一个单一的指标来说明收入分配的不平等程度是十分困难的，因此我们一般用一系列指标体系进行分析，衡量收入分配是否公平的原则包括（）原则、（）原则、（）原则和（）原则。
You executed the following command: RMAN> RECOVER COPY OF DATAFILE '/u01/app/oracle/oradata/orcl/users01.dbf'; Which statement regarding the above command is correct?（） The '/u01/app/oracle/oradata/orcl/users01.dbf' data file is recovered from the image copy。 The '/u01/app/oracle/oradata/orcl/users01.dbf' data file is recovered from the last incremental backup。 Image copies of the '/u01/app/oracle/oradata/orcl/users01.dbf' data file are updated with all changes up to incremental backup SCN. '/ u01/app/oracle/oradata/orcl/users01.dbf。 Image copies of the '/u01/app/oracle/oradata/orcl/users01.dbf' data file are recovered using the above command if data file recovery fail。
教师、校长的专业学习是嵌入到学校每天（）里去的。
Which of the following tools can be used to schedule a backup operation that is to be run every Sunday evening?（）
