In your Cisco EIGRP network， you notice that the neighbor relationship between two of your routers was recently restarted. Which two of these choices could have made this occur？（） ["An update packet with init flag set from a known， already established neighbor relationship was received by one of the routers.","The ARP cache was cleared.","The counters were cleared.","The IP EIGRP neighbor relationship was cleared manually."]
粗实线一般应用于（）。 ["灯号标识线","投光范围线","中轴线","天幕线"]
中转换车和中途下车旅客恢复旅行时，应先到车站办理（）。 ["车票改签手续","车票签证手续","车票退换手续","车票换乘手续"]
下列蔬菜作物中，属于瓜菜类的是（）。 ["西红柿、黄瓜、南瓜","黄瓜、南瓜、冬瓜","南瓜、黄瓜、西瓜","西瓜、黄瓜、西红柿"]
塞拉门安全管理规定：凡不进行旅客乘降的车门（）锁闭保险锁。 ["应该要","可","理应要","一律要"]
简述装甲兵组成。
