测定牛乳中是否含有磷酸酶，目的是物理判断乳的（）程度 ["酸败","加热","掺水"]
A network administrator is using a LAN analyzer to troubleshoot OSPF router exchange messages sent to ALLOSPF ROUTERS. To what MAC address are these messages sent？（） [" 00-00-1C-EF-00-00"," 01-00-5E-00-00-05"," 01-00-5E-EF-00-00"," EF-FF-FF-00-00-05"," EF-00-00-FF-FF-FF"," FF-FF-FF-FF-FF-FF"]
铁路乘车证分为（）类。 ["5","8","9","10"]
乌尔姆设计学院提出设计应以（）为基础。 ["人机工程学","美学","装饰","简约"]
各种乘车证均属有价证券，统一由铁路局印制。
楼面地价
