搜题请搜索小程序“爱下问搜题”
问题 单项选择题

在语言课上加上好听的歌曲，在体育游戏中加上故事，在数学课上加上绘画，这体现了（）。

A.教育目的的综合性

B.教育内容的综合性

C.教育制度的综合性

D.教育手段的综合性

答案

参考答案：B

单项选择题

Networks can be interconnected by different devices．In the physical layer，networks can be connected by (66) or Hubs, which just move the bits from one network to an identical net-work. One layer up we find bridgas and swiehes, which operate at data link layer. They can accept (67) , examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two netwoks. If two networks have (68) network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between the two transport connections. Finally, in the application layer, application gateways translate message
(69) . As an example, gateways between Internet e-mail and X.400 e-mail must (70) the e-mail message and change various header fields.

A．syntax

B．semantics

C．languages

D．format
查看答案
单项选择题

在常用制动位时，JZ-7型空气制动机主阀由于（）减压和副阀部的局减作用而呈制动位。

A、工作风缸管

B、作用风缸管

C、降压风缸管

D、列车管
查看答案