问题
单项选择题
从系统功能方面看，计算机网络主要由______两部分组成。
A．通信子网和资源子网
B．通信子网和数据子网
C．资源子网和数据子网
D．资源子网和数据通信
答案
参考答案：A
解析： 计算机网络由通信子网和资源子网两部分组成。通信子网负责全网的数据通信；资源子网提供各种网络资源和网络服务，实现网络的资源共享。
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从系统功能方面看，计算机网络主要由______两部分组成。
A．通信子网和资源子网
B．通信子网和数据子网
C．资源子网和数据子网
D．资源子网和数据通信
参考答案：A
解析： 计算机网络由通信子网和资源子网两部分组成。通信子网负责全网的数据通信；资源子网提供各种网络资源和网络服务，实现网络的资源共享。
| 阅读理解。 | |
| Birthdays are celebrated all over the world. Some ways to celebrate birthdays are rather similar from country to country: candles, cakes and birthday wishes. But there also different ways to celebrate birthdays. Here are a few: | |
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| 1.When someone is having a birthday in Denmark, you can see outside the window. A. flowers B. presents C. a flag D. a chair 2. In flowers are put on the chair of the birthday child. A. Japan B. Denmark C. India D. Holland 3. In , only birthday children wear colored clothes to school. A. India B. Holland C. Denmark D. Japan 4. In Japan, the birthday is more important for boys when they are . A. 15 B. 7 C. 5 D. 3 5. The passage is mainly about . A. similar ways of celebrating birthdays in some countries B. different ways of celebrating birthdays in some countries C. children's birthdays in western countries D. the importance of children's birthdays |