如何评估教师教的有效性。
You executed this command to create a temporary table： SQL> CREATE GLOBAL TEMPORARY TABLE report_work_area （startdate DATE， enddateDATE， class CHAR（20）） ON COMMIT PRESERVE ROWS； Which statement is true about the rows inserted into the REPORT_WORK_AREA table during a transaction（） The rows stay in the table only until session termination.。 The rows stay in the table only until the next transaction starts on the table.。 The rows are visible to all current sessions after the transaction is committed.。 The rows stay available for subsequent sessions after the transaction is committed。
通常把长期投资分为（）投资和（）投资两种。 广义的。 狭义的。 控股的。 非控股的。
正弦交流电变化过程中出现的（），称为最大值。用字母Em、Im、Um表示。
A customer has a large amount of data stored on three database servers and is concerned that at present there is no disaster recovery plan in place. They have an existing tape backup solution that meets their backup window. In order to analyze potential disaster recovery plans， which of the following questions is the most important？（） What is the minimum critical backup window？。 Which server is handling the most critical data？。 How much data is stored on each server？。 What is the throughput of the hard drives？。
在物流7要素中，流体借以流动的设施和设备是（）
