因特网连接的主机都必须遵守【6】协议。_爱下问搜题

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问题填空题

因特网连接的主机都必须遵守【6】协议。

答案

参考答案：TCP/IP

解析：因特网是一个覆盖全世界的广域网络。实际上它是由无数的网络，包括局域网和广域网连接而成。这些网络连接着无数的主机，它们都遵守TCP/1P协议，保证了相互之间通信时采用同样的寻址方式、命名机制和传输规则。TCP/IP协议是一个协议集，其中最主要的是TCP(传输控制协议)和IP(网络互连协议)。IP协议规定了因特网中的通信规则，为其高层用户提供无连接的服务，而 rcp协议则采用面向连接的方式来弥补和增强IP协议所提供的服务。

完形填空

Nicola’s Love for Her Violin
Can love between partners with a 237-year age gap (差距) lead to the perfect match (绝配)? Nicola Benedetti thinks so. The 18-year-old   36  and her “partner, a 255-year-old Italian violin,   37  to China for the first time last weekend. She   38  in Beijing on September 15 and also performed in Hangzhou and Shanghai.
Nicola is from Scotland and   39  playing the violin when she was four years old.   40 , it was not something her parents   41  her do. She went with her sister to violin lessons and   42  it and improved very quickly.
“There are so many different things I am fond of about the  43 ,” she said. “I can’t really   44  it but I love giving live performances, I like the feeling of playing and communicating with the   45 . I love the feeling of the violin under my chin (下巴).”
However, playing violin six hours a day is not a/an   46  job. “I usually   47  in an upstairs bedroom when I’m at home.” she said. “But sometimes, when it’s   48  outside, it can be upset. The house is right on the   49  and I can see others having fun   50  I’m on my own.”
Although practising is sometimes lonely, Nicola   51   felt she was lucky. “You can’t have   52 . I am really lucky to do what I love doing,” she said. Her   53  paid off (终有回报). Nicola won BBC Young Musician of the Year in 2004 at 16.
  54  her performing and recording activities, Nicola is a/an   55 of UNICEF (联合国儿童基金会). She said that she would travel to Lesotho in southern Africa at the end of this year to help poor kids there.

C．performances

填空题

函数曲线y=xe^-x的凸区间是______．