【简答题】在TCP/IP协议族中数据链路层的主要功能是什么?此层使用的地址是什么类型的?
【单选题】Jack came late, and his sister came even _________.
【单选题】Jack is always late for appointments. He seems to be ______ of leaving the house on time.
【单选题】Jack is late again. It is _______ of him to keep others waiting.
【简答题】如果要对一台具有 2个以太网及2个POS接口的路由器进行性能测试,请说明大致的测试安排。
【单选题】对于理想气体的多变过程,当多变指数n为( )时,转变为定容过程。
【单选题】Jack came late, and his sister came even _____.