搜题请搜索小程序“爱下问搜题”
问题 单项选择题

额定电压为35KV的开关用在10KV系统中，其遮断容量会（）

A、不变

B、增大

C、减少

D、不能用

答案

参考答案：C

解析：

题目来源：电力系统继电保护实用技术问答（第九章）

专业类型：继电保护

设备类型：公共部分

难度等级：难

电压等级：其他

知识点：二次回路

单项选择题

A transport layer protocol usually has several responsibilities．One is to create a process-to-process communication；UDP uses (71) numbers to accomplish this．Another responsibility is to providecontrol mechanisms at the transport level．UDP does this task at a very minimal level．There is no flowcontrol mechanism and there is no (72) for received packet．UDP, however,does provide errorcontrol to some extent．If UDP detects an error in the received packet，it will silently drop it．
The transport layer also provides a connection mechanism for the processes．The (73) must be able to send streams of data to the transport layer．It is the responsibility of the transport layer at (74) station to make the connection with the receiver,chop the stream into transportable units，numberthem，and send them one by one．It is the responsibility of the transport layer at the receiving end to waituntil all the different units belonging to the same process have arrived，check and pass those that are (75) flee，and deliver them to the receiving process as a stream．

A．jobs

B．processes

C．programs

D．users
查看答案
单项选择题

1/2，5/6，7/12，9/20，( )

A．7/30

B．11/30

C．13/25

D．32/27
查看答案