The de facto standard application program_爱下问搜题

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问题单项选择题

The de facto standard application program interface (API) for TCP/IP applications is the "sockets" interface. Although this API was developed for ___71___ in the early 1980s. it has also been implemented on a wide variety of non-Unix systems. TCP/IP ___72___ written using the sockets API have in the past enjoyed a high degree of portability and we would like the same ___73___ with IPv6 applications. But changes are required to the sockets API to support IPv6 and this memo describes thesechanges. These include a new socket address structure to carry IPv6 ___74___. new address conversion functions, and some new socket options. These extensions are designed to provide Access tothe basic IPv6 features required by TCP and UDP applications, including multicasting, while introducing a minimum of change into the system and providing complete ___75___ for existing IPv4 applications.

73（）

A．pottability

B．availability

C．capability

D．reliability

答案

参考答案：A

阅读理解

Victor’s hobby was collecting stamps. He had stamps from many countries, like England, Canada and China. On his birthday, can you guess what people gave him? That’s right---stamps.

Victor’s favourite stamps came from France. He had almost every stamp from 1954 to 2004. He only needed one. That was a 1974 special edition*. It was very hard to find.

He looked for it everywhere. He asked his friends and relatives to help him. But nobody could find the stamp. It made Victor very sad.

“Don’t worry. Never give up,” his father said to him. “If you have enough patience, you’ll find it one day.”

“I hope so,” Victor said.

Victor also liked writing. He had a penfriend in France. They wrote to each other every month. Victor’s penfriend, Phillip, usually used new stamps to send letters. Sometimes, his mother gave him stamps to use. Once Phillip’s mother gave him a big, green stamp. It looked old. When Victor received the letter, he was very surprised. On the envelope, he looked carefully at the stamp. It was the 1974 special edition stamp. Victor was so happy. He told his sister, his mother and his father.

“ You see,” his father said. “ You did find your stamp. So, it’s good to have two things in life.”

“What are they?” Victor asked.

“ Friends and patience.” He answered.

小题1:It was very difficult for Victor to find a special French stamp of _________.

A．1954

B．1974

C．1994

D．2004小题2:What does the underlined word “patience” mean?

A．勇气

B．知识

C．耐心

D．目标小题3:Who owned the special edition stamp at the very beginning?

A．Phillip.

B．Phillip’s mother.

C．Victor.

D．Victor’s father.小题4:The passage mainly tells us that ________ is(are) important to people.

A．a happy family

B．a good hobby

C．relatives and friendship

D．friends and patience

单项选择题

所有受计算机驱动的继电器采用（）类型继电器。

A.直流安全

B.交流安全

C.三相交流

D.非安全