单项选择题 which of the following statements is not true about maori population?A. Maori population makes up nearly one-seventh of New Zealand s total population.B. Maori population is younger than the total population.C. Non-Maori women tend to have children earlier than Maori women.D. Maori women tend to have more children than non-Maori women.

单项选择题 扩展以太网可以在协议栈的多个层次实现，其中在数据链路层实现以太网扩展的设备是（）A.网桥 B.路由器 C.集线器 D.三层交换机

未知题型 下列属于存货项目的有()。