变动成本水平的表现形式一般是（）。 ["变动成本总额","单位变动成本","变动成本率","约束性变动成本"]
You have a DNS server that runs Windows Server 2003 Service Pack 2 (SP2). You need to prevent the DNS server from resolving host names on the Internet. What should you do?（） ["Disable recursion. ","Create a stub zone. ","Disable round robin. ","Clear the DNS cache."]
伪晶体
Identity authentication, protocol encryption, secure guest access, voice over WLAN features, and a small device footprint are all highlights of what product in the wireless technology market?（） [" wireless monitoring device"," wireless LAN controller"," wireless bridge"," wireless management device"," access point"]
证券投资基金根据其组织形式不同，可以分为（）。 ["开放型基金","封闭型基金","契约型基金","公司型基金","收入型投资基金"]
简述饮食不节。
