任何单位和个人不得利用行 * * 力、职务或者职业便利以及其他方式强迫、限制农民或者农业生

(56) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.
(57) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.
(58) is an approach preferred by cable TV providers. In this solution the fiber terminates at an opto-electrical converter and the final segment is a shared coaxial cable.
(59) is a device used to connect two separate network that use different communication protocol.
(60) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

A．Router

B．Gateway

C．Bridge

D．hub

自发消费随收入的变动而变动，它取决于收入和边际消费倾向。

解释IO系统带来的一致性问题。

民事活动应该遵循自愿、公平、等价有偿、诚实信用的原则。

来样成交属于：（）。

A、质量以卖方的样品为标准成交

B、质量以买方的样品为标准成交

C、质量以“对等样品”成交

D、凭合同约定的质量标准成交