生成树协议(STP)启用后,端口可能存在哪些工作状态()。
A.学习
B.监听
C.阻塞
D.转发
E.关闭
参考答案:A, B, C, D
根据句意及首字母或汉语提示完成单词。
1. The classroom is d____, please clean it after school.
2. In the g____, there are some flowers.
3. If you are h____, you can buy some food in the supermarket.
4. Tom lives in Tokyo and he speaks J____.
5. T____ left, and go down the street. It's on your right.
6. We often read books in the ____ (图书馆).
7. You can ____(乘) the bus to the zoo.
8. There are all kinds of ____(动物)in the zoo.
9. What ____(语言)does your pen pal speak?
10. ____ (有时)we take a walk in the park after dinner.
至今国际红十字运动的产生和发展已有()年历史。
A、135
B、136
C、137
D、138