问题
填空题
IP网际地址基本格式有三种，其中______ 类地址用于中等规模情况，其中14位作为网络号，16位作为主要号。
答案
参考答案：B
解析：
[分析]： B类地址中的前两位地址表示网络地址，后2位表示网络内主机的地址；A类地址用于非常巨大的计算机网络，B类地址次之，C类地址则用于小网络。
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IP网际地址基本格式有三种，其中______ 类地址用于中等规模情况，其中14位作为网络号，16位作为主要号。
参考答案：B
解析：
[分析]： B类地址中的前两位地址表示网络地址，后2位表示网络内主机的地址；A类地址用于非常巨大的计算机网络，B类地址次之，C类地址则用于小网络。
| 完形填空。 | ||||
| The seasons in Australia are the opposite of ours. 1 it is winter here, it is summer there. Australia is 2 the south of the world. June, July and August are the winter months. The summer is in December, 3 and February. The north of the country is 4 than the south. Australia's main problem is 5 . A very large part of the country has no rain at all. But the east coast has rain 6 the year round. There are no dry months here. In March 1982, there was a terrible drought (干旱) in Australia. The summer rain didn't 7 . There were 138 million sheep in Australia this year. This was 14% of all the sheep in the world. Because there was no 8 rain and the grass didn't grow well, the farmers 9 to sell many of their sheep and many sheep 10 , too. It was a great disaster (灾难) for Australian farmers. | ||||
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