在企业初创期，企业营销战略的评估要素主要是（）。
轻型和重型腹泻的主要区别点是（）
什么是“电子警察”？
You require the Oracle server to manage the undo segments and space among various active sessions automatically. You created an undo tablespace， UNDO_TBS1， in your database. Which two additional steps would you perform to achieve this？（）
贸易的自然环境包括（）和（）两大类。
