题目内容
OSPF协议要求所有的区域都连接到OSPF主干区域0，当一个区域和OSPF主干区域0的网络之间不存在物理连接或创建物理连接代价过高时，可以通过创建OSPF虚链路(virtual link) 的方式完成断开区域和主干区域的互连。在该公司的网络中，区域3和区域0之间也需要通过虚拟链路方式进行连接，请给出路由器R3和路由器R8上的 OSPF进程配置信息。
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听力原文： From 1946 until 1954, the Vietnamese had struggled for their independence from France during the First Indochina War./ At the end of this war, the country was temporarily divided into North and South Vietnam./North Vietnam came under the control of the Vietnamese Communists who had opposed France and who aimed for a unified Vietnam under Communist rule./ The South was controlled by Vietnamese who had collaborated with the French./The United States became involved in Vietnam because it believed that if all of the country fell under a Communist government, Communism would spread throughout Southeast Asia and beyond./This belief was known as the" domino theory./" The U. S. government, therefore, supported the South Vietnamese government./This government' s policies led to rebellion in the South./Finally, however, the United States failed to achieve its goal,/and in 1975 Vietnam was reunified under Communist control;/in 1976 it officially became the Socialist Republic of Vietnam./
(1)
听力原文：Why did Bill give this advice？
Why did Bill give this advice？
Because Tom always does ______ of what people have advised.
水晶、玉髓、欧泊都是石英质类的晶质体玉石。()
参考答案：错误
弯曲内力剪力和弯矩的符号是根据()规定的。
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