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问题 单项选择题

瘢痕性类天疱疮属于( )

A．变态反应性疾病

B．感染性疾病

C．免疫缺陷病

D．自身免疫病

E．性传播疾病

答案

参考答案：D

解析： 瘢痕性类天疱疮是自身免疫病，不是变态反应性疾病或免疫缺陷病。

问答题 简答题

我矿对小绞车挂车数是怎样规定的？
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单项选择题

(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．MD

B．RSA

C．DES

D．MIB
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