健康教育的意义不包括（）

A.提高全人类整体的身体素质

B.消除或降低危险因素，降低发病率、伤残率、死亡率

C.提高生活和生命质量，并对教育效果作出评价

D.改善、达到、维持和促进个体和社会健康的一种有效手段

E.帮助人们建立和选择健康的生活方式

(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 opt~electrical 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．FTTC

C．HFC

D．FTTH