备用电源（standby power supply，SPS）

当手机处于Standby状态时，以下何种情况是正确的？（）

A:网络对手机发起建立寻呼时必须先在RA内寻呼MS； B:MS改变小区时必须通知网络； C:数据包刚刚传送完毕时MS处于此状态下。

在GPRS中，手机的移动性管理状态有三种：idle，ready，standby；在（）状态下GPRS手机没有附着到GPRS网上。

A:idle B:ready C:standby

GPRS的STANDBY状态，描述正确的是（）

A:用户附着在GPRS网络上 B:用户可执行路由选择、GPRS小区选择和重选工作 C:可发起PDP激活或者去激活过程 D:能进行FTP数据信息的收发

Warm Standby运行模式的主要特点.（）

A:CP正常状态下，主备两边并行运行。 B:CP正常状态下，主备两边的内存DS、RS、PS内容一致。 C:CP正常状态下，CP-SB边的系统软件已RELOAD好，主要是运行一些测试工作，但数据不是最新的数据。 D:CP正常状态下，CP-SB侧DS不是最新的数据。

APZ21240/50两边的运行模式是（）

A:Cold standby B:Hot standby C:Warm standby D:Manual standby

You probably don’t even realize it, but an energy thief is inside your home at this very moment. This thief is silent and unseen, and he’s picking your pocket. His name is "standby power." Standby power is the name given to the electricity used to power electrical appliances and devices even when they are turned off. But how can this be Isn’t an appliance "off" when you switch it off Not necessarily.
Many electronic devices consume electricity 24 hours a day just to stay warmed up for whenever you decide to use them. "Instant on" TV sets are one example. Whether you watch TV seven hours a day or not at all, the TV is always partially on, staying ready to flicker to life the moment you turn on its switch.
Other devices that consume power constantly are those that have external or internal clocks: microwave ovens, computers, VCRs, DVD players, and cable TV and satellite TV boxes. Energy experts estimate that approximately 5 percent of residential electrical power consumption in the United States is used for standby power. That’s a lot of power plants running overtime just to keep our electronics warm and ready to go.
Some of the most prevalent standby power devices are the large plug—in transformers that are used to step down power to cordless phones and answering machines. How much do these various devices consume Not much; just a few watts, maybe 3 to 5 each. But multiply that number over a 24-hour day, times the 6 to 10 devices in a typical home, and the scope of the savings could be greater than it may seem.
Which of the following is true about standby power

A:It makes up five per cent of all electricity consumption in the United States. B:Electrical devices that have internal or external clocks consume standby power. C:Standby power is not of significance compared to the whole consumption of electricity. D:Standby power is important to maintain the normal functions of electrical devices.

A Bluetooth device can be either a master or a slave and any of the devices within a ___30___can be the master. There is only one master and there can be up to ___31___ active slave devices at a time within a single network. In addition, a device may be a standby slave or a parked slave. There can be up to ___32___.parked slaves. If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to ___33___ mode before it can become active. Within a network, all ___34___ communications are prohibited.

33（）

A:master B:standby slave C:parked slave D:Active slave

A Bluetooth device can be either a master or a slave and any of the devices within a (1) can be the master. There is only one master and there can be up to (2) active slave devices at a time within a single network. In addition, a device may be a standby slave or a parked slave. There can be up to (3) parked slaves. If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to (4) mode before it can become active. Within a network, all (5) communications are prohibited.

4（）

A:master B:standby slave C:parked slave D:active slave

A Bluetooth device can be either a master or a slave and any of the devices within a （71） can be the master．There is only one master and there can be up to （72） active slave devices at a time within a single network．In addition, a device may be a standby slave or a parked slave．There can be up to （73） parked slaves．If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to （74） mode before it can become active．Within a network, all （75） communications are prohibited.

空白处（74）应选择（）

A:master B:standby slave C:parked slave D:active slave