问题
单项选择题
局域网交换机首先完整地接收数据帧，并进行差错检测。如果正确，则根据帧目的地址确定输出端口号再转发出去。这种方式为：（）。
A.直接交换
B.改进直接交换
C.存储转发交换
D.查询交换置
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
局域网交换机首先完整地接收数据帧，并进行差错检测。如果正确，则根据帧目的地址确定输出端口号再转发出去。这种方式为：（）。
A.直接交换
B.改进直接交换
C.存储转发交换
D.查询交换置
参考答案：C
先阅读短文，掌握其大意，然后从方框给的词中选出最恰当的10个，并用其适当形式填空，每个词只限用一次。（10分）
The orange tree is beautiful. It has a lot of shiny green 小题3: . The small white flowers smell very sweet. An orange tree 小题4: flowers and fruit at the same time. There were orange trees twenty million years ago. The oranges were very small, not like the 小题5: today. The orange tree probably came from China. Many different kinds of wild oranges 小题6: in China today. The Chinese started to raise(栽培) orange trees about 4,400 years ago. Farmers in other parts of Asia and the Middle East 小题7: to raise oranges from the Chinese. 小题8: they taught Europeans. The Spanish planted orange trees in the new world (North and South America). They took them to Florida 小题9:. Oranges are a very important crop in Florida today. In English, orange 小题10: both a fruit and a color. We use the name of the fruit for the color. |