They found the lecture hard．

The heavy snow could not keep us going out to work．A.fr...

单项选择题The heavy snow could not keep us going out to work．

I knew him better,I discovered that my impression had b...

单项选择题I knew him better,I discovered that my impression had been right．

下面哪个标准可用于为网络选择适当类型的网络传输介质？（ ） A、需要优先处理的数据类型  B、网络中使用的终端...

单项选择题下面哪个标准可用于为网络选择适当类型的网络传输介质？（ ）
A、需要优先处理的数据类型 
B、网络中使用的终端设备的成本 
C、网络中安装的中间设备的数量 
D、要安装所选介质的环境