It is (believed)that trees can warn (each other) (to) danger by releasing (chemicals) into the air.
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在图1-12所示的网络拓扑图中,(A)连接点的双绞线应连接到什么设备上才能获得正常的网络服务?
试用社会存在与社会意识辩证关系原理,分析说明加强和改进大学生思想政治教育的紧迫性和重要意义。
“网桥”的功能是实现OSI参考模型中【 】层的设备连接。
When is the deadline for applying for the second round of endowments?