For each blank, choose the best answer from the four choices and write down on the answer sheet.
(66) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.
(67) 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.
(68) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable.
(69) is a device used to connect two separate network that use different communication protocol.
(70) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

A．ADSL

B．FITC

C．HFC

D．FTTH

宗教作为一种社会意识形态来说，其本质是()。

A．剥削阶级用来统治广大劳动人民的精神武器

B．对客观世界虚幻的歪曲的反映，是唯心主义的世界观

C．人类社会发展到一定历史阶段、人类思维能力发展到一定水平而出现的一种社会现象

D．引导人们崇拜大自然，追求死后的“极乐世界”