LOCAL-BUS的错误描述是（）

A:LOCAL-BUS-A用于主架，LOCAL-BUS-B用于E架 B:621型机架的C5、C6为LOCAL-BUS的扩展接口，不用时要终止 C:1024型机架只有C5接口，说明C5接口是LOCAL-BUS-B的接口 D:LOCAL-BUS是一对时分总线，每个TRU单元只占用其中3个TS

设超级用户root当前所在目录为：/usr/local，键入cd命令后，用户当前所在目录为（）。

A:/home B:oot C:/homeoot D:/usr/local

超级用户root当前所在目录为：/usr/local，键入cd命令后，用户当前所在目录为（）。

A:home B:oot C:homeoot D:usr/local

局域网是与广域网相对应的网络系统，它的英文全称是（）Local。

A:Area Network B:Local Network C:Local A’network D:Local Internet

关于BGP的Local_Preference属性，以下说法正确的是（）

A:Local_Preference属性为公认可选属性 B:Local_Preference的属性值仅影响离开该AS的流量，不影响进入该AS的流量 C:BGP路由器将该属性传给IBGP邻居 D:BGP路由器将该属性传给EBGP邻居

请问LOCAL_PREF和PREFERRED-VALUE两者有什么区别？（）

A:LOCAL_PREF拥有更高的优先级 B:PREFERRED-VALUE可针对邻居进行设置 C:LOCAL_PREF是影响入流量的路径选择 D:BGP路径选择的原则最先比较LOCAL_PREF，再比较PREFERRED-VALUE

请问LOCAL-PREF与MED的区别。（）

A:MED是可选过渡属性，LOCAL-PREF是公认非过渡属性 B:MED通常通过外部链路宣告给对等体，区分本地AS到同一邻居AS之间的多入口链路 C:LOCAL_PREF必须包含在UPDATE消息中，并传递到其它BGP邻居 D:LOCAL_PREF只能发布给IBGP邻居，数值越高越优先

以下有关Local和Global SAE的区别，不正确的有（）.

A:Local SAE仅与一个功能块有关，Global SAE与多个功能快有关 B:Local SAE仅与一个交换节点有关，Global SAE与多 C:个交换节点有关 D:LocalSAE与多个功能块有关，GlobalSAE仅与一个功能快有关

Local和GlobalSAE的区别是（）

A:Local SAE仅与一个功能块有关，Global SAE与多个功能快有关 B:Local SAE仅与一个交换节点有关，Global SAE与多个交换节点有关 C:Local SAE与多个功能块有关，Global SAE仅与一个功能快有关

There’s nothing simple about gun control, a tangle of legal, political and public-health issues complicated by cultural preferences and regional biases. Passions run high on all sides. Lifelong hunters who
grew up with firearms, urban victims of gun violence, Second Amendment scholars, NRA lobbyists, chiefs of police—they’ve all got cases to make and they make them well, often contentiously.
For the past 15 years, much of the debate has centered on the effectiveness of the Brady Handgun Violence Prevention Act, the federal gun-control bill that was passed in 1993. Critics say the focus on law-abiding gun buyers doesn’t address the real issue—bad guys who acquire their weapons illegally. Supporters say that the bill stops thousands of illegal gun purchases and deters crime and violence. Now medical research has come to the rescue, sifting through the data to figure out which legal measures work best to reduce firearm suicides and homicides.
In a paper published in the May issue of the American Journal of Preventive Medicine, Steven Sumner, a third-year med student and Dr. Peter Layde, codirector of the Injury Research Center at the Medical College of Wisconsin, found that local background checks, which are optional and used by just a handful of states, were more effective than the federal background checks mandated by the Brady law. The report compared the homicide and suicide rates in states that perform only federal checks with states that do state-level checks and those that perform local-level checks. The local-level checks were associated with a 27 percent lower firearm suicide rate and a 22 percent lower homicide rate among adults 21 and older, the legal age to purchase a gun.
Why are local checks so much better "We hypothesize that it’s due to access to additional information that’s not available at the federal checks," says Layde, "particularly related to mental-health issues and domestic-violence issues." All 50 states use the National Instant Criminal Background Check System (NICS), the minimum required under Brady, while 17 states also perform state-level checks and 12 do additional local-level checks.
"This is the first study that’s looked at this issue," says Layde. "If the magnitude of impact we found were in fact to apply to all 50 states, you would expect a very substantial reduction in suicides and homicides linked to firearms, many thousands. " However, background checks can be both an administrative and a cost burden for strapped and stretched local authorities. There is another way to get the same results., improve the flow of local information to the NICS databases. "In an ideal world," says Layde, "you might not have to have the local agencies involved if you just reliably got all the data they had up to the federal level.

A:all local authorities should make local background checks B:further study should be made about the effect of the Brady Act C:data from local background checks should be incorporated into NICS D:local authorities should receive more funding for background checks