耐受性定律
You executed the following procedure to collect statistics regarding an index： SQL>ANALYZE INDEX EMP_ID VALIDATE STRUCTURE； Which view will you use to determine whether you need to rebuild the index or not？（） [" INDEX_STATS"," DBA_INDEXES"," DBA_IND_COLUMNS"," V$OBJECT_USAGE"]
通过优化设计、加大科技投人、招标投标管理进行有效的投资控制，坚持建设监理制，采取“小业主、大监理”的管理模式是（）的特点 ["造价","工程管理","监理","招标"]
长期投资评估在确定风险报酬率时，需要考虑被评估企业的（）。 ["经营风险","财务风险","倒闭风险","行业风险","突发事件"]
You have two tables with referential integrity enforced between them. You need to insert data to the child tablefirst because it is going to be a long transaction and data for the parent table will be available in a later stage，which can be inserted as part of the same transaction. View the Exhibit to examine the commands used tocreate tables. Which action would you take to delay the referential integrity checking until the end of thetransaction（） ["Set the constraint to deferred before starting the transaction.","Alter the constraint to NOVALIDATE state before starting the transaction.","Enable the resumable mode for the session before starting the transaction.","Set the COMMIT_WAIT parameter to FORCE_WAIT for the session before starting the transactio"]
为什么说交通事故有人为性？请举例说明。
