承运人是在货物运输合同中承担提供运输工具（船舶、飞机、汽车、火车等）并负责按照托运人

(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．MD

B．RSA

C．DES

D．MIB

下列选项中，( )的目的是保证投资方向符合国家的产业政策，符合社会经济发展规划和环境保护等方面的要求，合理控制整体投资规模。

A．贷款银行项目管理
B．承包商项目管理
C．咨询工程师项目管理
D．政府部门项目管理

DSP--4000系列数字式电缆分析仪可提供一套完整的测试、验证电缆和计算机的功能，还能进行文档备案。（）

简述财务经理的主要职责。