酶的分离纯化方法中，根据目的酶与杂质分子大小差别有（）法，（）法和（）法三种。
施工项目成本管理需要采取各种措施，属于成本管理经济措施的有（）。 ["加强调度，避免因计划不周和盲目调度造成窝工损失，使施工成本增加","管理人员应编制资金使用计划，确定、分解施工成本管理目标","对各种变更，及时做好增减账，及时落实业主签证","认真做好资金的使用计划，并在施工中严格控制各项开支","结合施工组织设计及自然地理条件，降低材料的库存成本和运输成本"]
大电流接地系统
Your network consists of a single Active Directory domain and two network segments named Subnet1 and Subnet2. You deploy a server named Server1 that runs Routing and Remote Access. Server1 is configured as a router between the two network segments. You deploy a DHCP server on Subnet1. You configure a DHCP scope for each network segment. Client computers that run Windows XP Professional Service Pack 3 （SP3） are deployed on both network segments and are configured to receive IP configurations dynamically. You discover that all client computers on Subnet2 have Automatic Private IP Addressing （APIPA） addresses. You need to ensure that all client computers on Subnet2 receive their IP configurations from the DHCP server. What should you do in Routing and Remote Access？（） ["Disable IP Routing.","Create a static route.","Enable demand-dial routing.","Enable a DHCP Relay Agent."]
《工程结构可靠性设计统一标准》（GB 50153-2008）中规定对于标志性建筑和特别重要的建筑的设计使用年限为（）年。 ["5","25","50","100"]
外国公司分支机构
