【单选题】每种活动都存在最佳的动机水平,随着任务难度的增加,最佳动机水平有()的趋势。
【单选题】I cannot understand why Steven bought so many watches but never wears _____ of them. [ ]
【单选题】主机A向主机B发送IP分组,途中经过了4个路由器,那么,在IP分组的发送和转发过程中,共使用ARP协议的次数是( )。
【单选题】主机A向主机B发送IP分组,途中经过了4个路由器,那么,在IP分组的发送过程中,最多可能使用多少次ARP协议( )
【单选题】主机A向主机B发送IP分组,途中经过了4个路由器,那么,在IP分组的发送和转发过程中,共使用ARP协议的次数是( )
【单选题】随着任务难度的增加,最佳动机水平有( )的趋势。
【单选题】I cannot understand why Steven bought so many watches but never wears of them.A.anyB.bothC.every
A.
I cannot understand why Steven bought so many watches but never wears ____ of them. A.any