搜题请搜索小程序“爱下问搜题”
问题 单项选择题

等直杆的受力情况如图，则杆内最大轴力Nmax和最小轴力Nmin分别为：（）。

A.Nmax=60kN、Nmin=15kN

B.Nmax=60kN、Nmin=-15kN

C.Nmax=30kN、Nmin=-30kN

D.Nmax=90kN、Nmin=-60kN

答案

参考答案：C

解析：

单项选择题

《城市规划编制办法》于1991年9月2日正式发布实施，该办法共包括( )。

A．4章28条

B．3章21条

C．6章35条

D．5章3l条
查看答案
单项选择题

A glue that holds the whole Internet together is the network layer protocol, ___35___. Unlike most older network layer protocols, it was designed from the beginning with internet working in mind. Its job is to provide a-___36___ way to transport datagrams from source to destination, without regard to whether these machines are on the same network or whether there are other networks in between them.

Communication in the Internet works as follows. The ___37___.layer takes data streams and breaks them up into datagrams. Each datagram is transmitted through the Internet, possibly being fragmented into smaller units as it goes. When all the pieces finally get to the destination machine, they are reassembled by the ___38___ layer into the original datagram. This datagram is then handed to the transport layer, which inserts it into the receiving process input stream.

An IP datagram consists of a header part and a text part. The header has ___39___ part and a variable length optional part.

37（）

A.data link 

B.transport 

C.network 

D.Application
查看答案