投标报价策略可分为（）、竞争型策略和赢利型策略。
美国生涯理论专家萨珀认为，职业生涯的中心是（）。 ["个人","社会","组织","取位"]
单向应力
由概念设计进入逻辑设计时，原来的（）联系通常都需要转换成对应的基本表。 ["一对一","一对多","多对多","多对一"]
You configure a Windows Server 2008 R2 Hyper-V server with several virtual machines （VMs）. A software vendor releases a software update for an application that runs on only one of the VMs. You need to plan a strategy that enables you to install and test the update without interrupting business operations and without corrupting data. What should you do first？（） ["Export the VM","Create a snapshot of the affected VM","Enable the Windows Volume Snapshot Service on the affected VM","Enable the Windows Volume Snapshot Service on the Hyper-V server"]
某企业全年需要甲零件1200件（单价10元），每一次的订货成本为400元，每件年储存成本为6元。订货期为30天，保险储备量为50件。若一次订货超过600件，供应商可给予2%的数量折扣，又应以多大批量订货？
