题目内容

The new system is said to enable us to use much less oil than before, in other words, to _______________ considerably. (increase, efficiency)

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Speaking of the real estate market, when people are losing their jobs, it is almost certain that the house prices _____________ (go down)

A regional conference on____________the fishery resources will be held in Seoul next week. (conservation)

物理层协议实际上是规定与传输介质接口的下列哪些特性？

A. 机械特性
B. 电气特性
C. 功能特性
D. 规程特性

DTE是（），指的是具有一定数据处理能力和数据发送接收能力的设备，包括各种I/O设备和计算机。