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问题 单项选择题

在路由器配置参数中，（）指明为黑洞路由。

A、blackhole

B、reject

C、preference-value

D、gateway-address

答案

参考答案：A

补全对话，情景问答
看图写单词。
1. — I often go to school by bike, what about you?
— I often _____________ to school.
2. — What's in the store?
— There are many nice _____________ in it.
3. — How many _____________ do you need for your trip?
— I need two.
4. — Your answer is right. Please _____________ down.
— Thank you.
5. — Lucy! Here's a _____________ for you. You can leave for Xi'an tomorrow.
— Thank you, Mike.
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单项选择题

光缆线路敷设于200m及以上的大桥两端，应各余留（）m。

A、1～2

B、3～5

C、5～7

D、8～10
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