[音频]What is the main idea of the news report?
A. China provides education loans to African countries.
B. Many Africans study in China with financial assistance.
C. There is a trend of learning Chinese in African countries.
D. African students are unhappy about Chinese education.
查看答案
What will Violet Bwalya of Zambia study after finishing her study of Chinese?
A. Politics.
B. Science.
C. Finance.
D. Medicine.
Which one is mentioned as a problem affecting the quality of Chinese education?
A. Teaching methods.
B. Lack of funds.
C. Language communication.
D. Lack of professors.
以下关于局域网拓扑结构的描述中,错误的是
A. 总线型局域网所有节点都通过网卡连接到一条作为公共传输介质的总线上
B. 当一个节点通过总线以“广播”方式发送数据时其他节点只能处于接收状态
C. 同一时刻出现两个或以上节点发送数据就会出现“冲突”
D. 传统的总线型Ethernet节点获得发送数据帧的时间是确定的
以下关于令牌总线工作原理的描述中,错误的是
A. 在令牌总线网中节点通过环接口连接成逻辑环形
B. 令牌是一种特殊结构的控制帧,用来控制节点对总线的访问权
C. 令牌总线网中每个节点两次获得令牌的最大时间间隔是确定的
D. 令牌协议在重负载情况下信道的利用率低
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