爱岗敬业的当代要求是（）。

A.干一行、爱一行、专一行

B.各司其职、各尽其力、各显其能

C.不计报酬、加班加点

D.不跳槽、不换岗、不幻想

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．MD

B．RSA

C．DES

D．MIB