(),zigbee Alliance成立。

A . 20Kbps B . 30Kbps C . 40Kbps D . 250K

A . 255个 B . 65536个 C . 65000个 D . 72000个

A . A.Zigbee设备对象 B . B.应用支持子层 C . C.应用对象

A . A、健康监护 B . B、汽车应用 C . C、消费电子应用 D . D、军事应用

A . A、星型 B . B、网状 C . C、环形 D . D、树形

A . A、交换机 B . B、网络协调器 C . C、全功能设备（FFD. D . D、精简功能设备（RFD.：

A . 低功耗 B . 低成本 C . 高速率 D . 高容量

A . 1 B . 2 C . 3 D . 4

A . Buddhist B . Catholic C . Protestant D . Muslim

A . IEEE802.15.1 B . IEEE802.15.4 C . IEEE802.11.1 D . IEEE802.11.4

A . A、物理层 B . B、MAC层 C . C、网络/安全层 D . D、支持/应用层

A . A、IEEE802.15.4 B . B、IEEE802.11.4 C . C、IEEE802.12.4 D . D、IEEE802.13.4

A . 1个 B . 3个 C . 2个 D . 4个

A . 物理层和介质访问控制层 B . 介质访问控制层和网络层 C . 网络层和应用层 D . 应用支持子层

•Choose the best word to fill in each gap, from A, B or C. •For each question (29-40), mark one letter (A, B or C) on your Answer Sheet. THE BIG NUMBER The country's demand for telephones, mobile phones, faxes and the Internet is growing at an increasingly fast rate. In fact, it is growing (29) quickly that our telephone numbering system needs re-organizing (30) some major changes will have to (31) made. These changes, (32) , will make the system simpler and easier to use. It is (33) an important task that all the UK phone companies are working together to make (34) changes. The changes will (35) only make hundreds of millions of new numbers, but they will (36) bring order and flexibility to the system for years to come. (37) main changes are due to happen (38) now and the year 2006, which will give you (39) of time to prepare. You will find details of the number changes on our website, (40) you can visit any time at www. numberchange, org, or call our free phone helpline on 800—820—7713. (29) A．so B．that C．too

A．结构复杂 B．结构简单 C．操作不方便 D．不易于执行