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问题 单项选择题

某二叉树的中序序列和后序序列正好相反，则该二叉树一定是______ 的二叉树。

A．空或只有一个结点

B．高度等于其结点数

C．任一结点无左孩子

D．任一结点无右孩子

答案

参考答案：C

填空题

______博物馆是全国性地质博物馆，也是亚洲最大的自然科学类地学博物馆。P88
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单项选择题

Both bus and tree topologies are characterized by the use of multipoint （1）. For the bus, all stations attach, through appropriate hardware （2）known as a tap, directly to alinear transmission medium, or bus. Full-duplex operation between the station and the tap allowsdata to be transmitted onto the bus and received from the （3）. A transmission from anystation propagates the length of the medium in both directions and can be received by all other（4）. At each end of the bus is a （5）, which absorbs any signal, removing it from thebus.

（4）是（）

A.routers

B.stations

C.servers

D.switches
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