对选定的对象的轮廓进行填充，下列正确的是：（）A、按鼠标右键选中调色板中的颜色 B、

老师找到四个与动物有关的成语，其中所涉及到的动物都属于恒温动物的成语是

A．[蛛]丝[马]迹

B．[鸡][犬]不宁

C．[鹬][蚌]相争

D．[虎]头[蛇]尾

根据网络拓扑和R1的配置，解释并完成路由器R3的部分配置。
…
R3(config)#crypto isakmp key (7) address (8)
R3 (config)# crypto transform-set testvpn ah-md5-hmac esp-dex esp-md5-hmac (9)
R3 (cfg-crypto-trans)#exit
R3 (Config)#crypto map test 20 ipsec-isakmp
R3 (config-crypto-map)#set peer 192.168.1.1
R3 (config-crypto-map)#set transform-set (10)
…

完成句子。

1.We are kept ______(得知)what is happening in the world by reading newspapers.(inform)

2. I will have to stay inside unless (停止下雨) tomorrow. (stop)

3. _____(一旦公之于众)in the newspaper, the incident will attract lots of people's attention. (expose)

4. Mike _______(不可能在听)the lecture now, for I saw him playing basketball on the playground

    a minute ago. (listen)

5. If you don't go to the concert, ________(我也不去). (neither)

6. Mary is the only one of my good friends ________(愿意帮助我), no matter what difficulty I

    may meet. (willing)

7. _______(我们应该牢记)is that practice makes perfect. (keep)

8. Since all the tickets ________(已售完)when we got there, we had to go again the next day. (sell)

9. Jane happened ________(在购物)in the supermarket when I called her to have dinner with us. (do)

10. Only after participating in the speech contest ________(Tom变得更自信)and had more

      experience. (become)

下列哪种途径不是乙型肝炎病毒的重要传播途径（）

A.输血传播

B.医源性传播

C.垂直传播

D.接触传播

E.粪-口传播

以下都位于媒体交换层的设备有？（）

A.RM

B.GK

C.MCU

D.FireWall