[多选] Which three statements are correct about temporary tables？（）

基站固定式油机每月做一次巡检，试机运行时间不低于15分钟，每个季度至少做（）次负载（也叫带载）运行测试。 1。 2。 3。 4。 Evaluate these two SQL statements: What is true about them?（） The two statements produce identical results.。 The second statement returns a syntax error.。 There is no need to specify DESC because the results are sorted in descending order by default.。 The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.。 沸腾是指发生在（）剧烈气化的现象。 液体内部。 液体表面。 液体内和表面同时。 Consider the Mysql Enterprise Audit plugin. Which statement is true when you identify a connection event that has used external authentication?（） The attribute "STATUS" is set to the string EXTERNAL_AUTH。 The attribute "PRIV_USER" contains the username。 The event type that is given in the attribute "NAME" is EXTERNAL_AUTH。 There is no differentiation between native and external authentication events。 External authentication is managed through external auditing logs。 The "PROXY_PRIV" user shows a username if external authentication is used。 组成计税价格的公式为：（）。 成本+利润。 成本+费用。 成本+税金。 费用+税金。 Which three statements are correct about temporary tables？（）