【简答题】TCP/IP 体系结构 分为四层,他们从低到高分别是( )、( )、( )、( )。
【简答题】 Listen to the following short dialogues and choose the appropriate answers.
【简答题】 Listen to the story and choose the right answers to the questions you hear.
【判断题】楼梯的组成包括楼梯梯段、楼梯平台和栏杆扶手,其中梯段的合理踏步数为3≤ X ≤ 20 。
【简答题】 Listen to the speech / talk again and choose the right answer.
【单选题】 Listen and choose what you hear.
【单选题】 Listen and choose the most proper responses to the questions you hear.
A.
Yes, his father is a doctor.
B.
No, this is not a factory.
C.
No, he works in that one.
【单选题】下列成分中,不属于呼吸链组分的是( )P.126