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问题 不定项选择题

下边的漫画启示我们[ ]

A．保护环境，人人有责

B．要提高节约资源、保护环境的意识

C．保护环境要求全社会行动起来，从身边小事做起

D．保护环境是大人们的事情，我们青少年的任务是好好学习

答案

ABC

阅读理解与欣赏

       甲虫音乐家们全神贯注地振着翅膀，优美的音韵，像灵泉一般流了出来。此时，我觉得它们的音乐优于人间的一切音乐，这是只有虫子们才能演奏出来的！     

1．用“灵泉一般流了出来”形容____________________________ 。    

2．“此时”是指_________________ 的时候。    

3．从“我觉得它们的音乐优于人间的一切音乐”这句话中可体会到作者对草虫的________________之情。
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单项选择题

When the system upon which a transport entity is running fails and subsequently reatarts, the ___34___ information of all active connections is lost. The affected connections become half-open, as the side that did not fail does not yet realize the promble.

The still active side of a half-open connections using a ___35___ timer. This timermeasures the time transport machine will continue to await an ___36___ of a transmitted segment after the segment has been retransmitted the maximum number of times. When the timer ___37___, the transport entity assumes that either the other transport entity or the intervening network has failed. As a result, the timer closes the connection, and signals an abnormal close to the TS user.

In the event that a transport entity fails and quickly restart, half-open connections can be teminated more quickly by the use of the RST segment. The failed side returns an RSTi to every segment i that it receives. When the RSTi reaches the other side, it must be checked for validity dased on the ___38___ number i, as the RST could be in response to an old segment .If the reset is valid, the transport entity performs an abnormal termination.

38（）

A. connection

B. acknowledgment

C. sequence

D. message
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