沥青碎石与沥青混凝土有何不同？

A

Ever since humans lived on the earth, they have made v 小题1:   forms of communication. In general, the major form of expressing thoughts and feelings has been s_小题2:__ language. But when there is a language barrier(障碍), that is, people ­­­m 小题3: each other , communication is completed through body language where gestures r 小题4:  letters , words and ideas. Here are many forms of body language in the world, each having its own f 小题5: .

Smile is the most u 小题6:  facial expression, which shows happiness and put people at

e 小题7: . When someone gets angry, he may f  小题8:_, turn his back to others or make a fist shaking it.  

There are also different ways to g 小题9:__ someone in different countries. In a word, We should study international customs to avoid difficulties in today’s world c 小题10:  crossroads.          

B.

My aunt, a s 小题11:__ in women’s disease, devoted all her life to her w 小题12:career without e 小题13: . She often worked far into the night to d 小题14: babies for the poor . It was her kindness and c 小题15:   she showed to her patients that made her successful . Despite of being a success as a doctor, she was m  小题16: , not proud.               

Her devotion to medical science i 小题17: me greatly. Suddenly a bright idea came c 小题18:  in  my mind, “why not c 小题19:  on her career and work as an o 小题20:doctor?”

下列物质充分燃烧后，产物完全相同的是（　　）

A．木炭和一氧化碳

B．一氧化碳和甲烷

C．甲烷和木炭

D．氢气和酒精

二维曲线能进行布尔运算，其类型分为（）。

A、合集分集并集

B、交集并集差集

C、分集交集并集

D、都不对

在对网络运行及维护前首先要了解网络，包括识别网络对象的硬件情况、判别局域网的拓扑结构和信道访问方式、确定网络互联以及用户负载等。常见的3种拓扑结构是星形、 (1) 与 (2) 拓扑结构，而常见的信道访问方式有 (3) 及 (4) 。
网络配置和运行包括一系列保证局域网络运转的工作，主要有：选择网络操作系统和网络连接协议等；配置网络服务器及网络的外围设备，做好网络突发事件预防和处理；网络安全控制，包括网络安全管理、网络用户权限分配以及病毒的预防处理等。配置网络过程中要做好数据备份工作，一般来说，备份的硬件设备包括磁盘、 (5) 和 (6) ，而利用磁盘备份的方法常用的是磁盘镜像 (7) 以及磁盘阵列，其中前两者的区别在于 (8) 。
网络维护是保障网络正常运行的重要方面，主要包括故障检测与排除、网络日常检查及网络升级。一定要建立起 (9) 制度，记录网络运行和变更的情况，以保证维护经验的交流与延续。

下面哪种情况的证书编码不是按原证书编码打印（）

A、遗失证书补证

B、中英文证书换发

C、证书信息改错

D、旧等级证书换发