【判断题】
低阶通道检测到的误码，高阶通道不一定能检测到；而高阶通道检测到的误码，复用段信号不一定能检测到。（）
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相关试题
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第2层交换机是靠IP地址来完成数据的转发。
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第3层交换机是靠mac地址来完成数据的转发。
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第一次Y路由器进行配置时，可采用telnet方式
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抖动指数字信号的特定时刻相Y其理想时间位置的短时间偏离。
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端口聚合就是将多个端口聚合在一起，以实现Y出/入负荷在各成员端口中进行分担。
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多个网管监控同一网元时，应该为各个网管创建不同的网元用户。
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多模光缆主要用于高速度,长距离的传输;单模光缆主要用于低速度,短距离的传输。
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多数表决原理可以判断哪一路是最好的时钟源。
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二纤双向复用段保护环，其主用信道可占用主纤上的全部时隙。
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二纤双向复用段共享保护环中的ADM配置下，业务保护情况为一根光纤上的后一半信号为另一根光纤前一半信号的备份。（）
【判断题】
发光模块的色散容限会限制光信号传送距离。
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发射机不可以使用12伏外接电池作为电源
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发生通道环断纤时，则断纤两端网元有PS告警。
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防静电屏蔽袋若出现破损，如穿孔、破裂、复合层分离等，可以循环使用，不作报废处理。
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非常规性客户拜访不受时间与地点的限制，主要针Y近期矛盾集中化的问题进行沟通与协商解决。此部分拜访主要集中在售后客户故障处理，客户现场疑难解答等方面。
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分光器带有一个上行光接口，若干下行光接口。从上行光接口过来的光信号被分配到所有的下行光接口传输出去，从下行光接口过来的光信号被分配到唯一的上行光接口传输出去。只是光信号从上行光接口转到下行光接口的时候，光信号强度/光功率将下降。
【判断题】
风扇故障或机房温度过高，设备散热不好会导致传输设备出现大量误码或业务中断。
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复用段保护倒换的启动条件包含：R-LOS、R-LOF、MS-AIS
【判断题】
复用段保护倒换实质上是故障点两端的网元倒换，其余网元穿通。
【判断题】
复用段保护方式比通道保护方式要慢一些，但是通道的利用率高很多。
【判断题】
感应法不用接入管线就可以施加信号，使用非常简单快捷
【判断题】
告警单板是指网管告警监视窗口中的“检测点单板”，该单板指示告警，告警来源一定就是告警单板。
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告警反转的触发告警是LOS和AIS告警。
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各传输机房应按规定要求装设地线，并应将其交流零线、直流电源地、信号地、设备保护地和光缆保护地分开，采用独立引线连接至公用地线。
【判断题】
各类误码字节所检测路由的具有一定的覆盖关系，所以通常情况下B1误码会引起B2、B3，B2误码会引起B3和V5误码，B3会引起V5误码。
【判断题】
各类信息化接入均有网络部全业务专业负责协调，并组织实施。
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给定子网地址5.32.0.0和子网掩码255.224.0.0,在这个子网中允许的最高的主机地址是5.63.255.255。
【判断题】
根据OptiX 设备数据设定规范，已经配置了业务的通道，其“通道装载”属性必须设置为“装载
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更换硬件设备时，必须配戴防静电手腕，且该防静电手腕必须接地良好。
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公共信道信令是将传送信令的通路与传送语音的通路分开，即把各电话
【判断题】
公有地址是可以作为私有地址使用的，但有时容易引发一些不必要的问题。
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光波是一种高频电磁波，不同波长（频率）的光波复用在一起进行传输，彼此之间相互作用，将产生四波混频（FWM）。
【判断题】
光电转换器是实现光电信号转换的设备，也称光猫、协转、光纤收发器。
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光放大器实际上是将电信号进行放大，然后进行电光转换。
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光放大器是一种需要经过光/电/光的变换而直接Y光信号进行放大的有源器件。
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光分路器的每一纤芯均应有标识，标识格式符合《中国移动通信集团浙江有限公司全业务接入工程施工规范》要求。
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光分纤箱的施工按照YD5051-97《本地网通信线路工程验收规范》。
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光功率计是光功率测量设备，按λ键可使所测光波长转换一次，常用的波长为1310nm和1550nm两档
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The word "wag" (Line 1, Para.1) most probably means _________.
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The video cameras were used to catch the dogs' responses because ___________.
A. the dogs were put in the wooden boxes
and tested one at a time
B. it was easier to catch the dogs’s response changes in the tail wagging
C. they enabled the dogs’owners to know
about their dogs’; habit
D. the dogs wagged their tails in different
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When there are no stimuli, a dog will ___________.___
A. wag to the right
B. no wag at all
C. wag to the left
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The purpose of doing the experiment is _________.___
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B. to help dogs find companion
C. to help people choose their pet dogs
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The underlined word "they" in the last sentence refers to __________.___
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The new law passed in Rome will ________.___
A. help improve fishing environment
B. stop people from catching goldfish
C. guarantee better conditions for goldfish
D. discourage keeping goldfish at home
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People in Rome believe that the civilization of a city can be judged by _________.___
A. awareness of animal protection
B. exchanges with other cities
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The underlined word "compassion" in Para 2 is the closest in meaning to __________.___
A. support
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People may break the law in Turin if they ________.___
A. keep their dogs or cats in cars
B. shut their dogs home all day long
C. raise their cats near ancient ruins
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We can infer from the passage that _________.___
A. the owners can leave their dogs in hot cars
B. the cat only lives in modern life
C. the new law can prevent cruelty to animals
D. the new law gives recognition to the
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If a person finds getting up early a problem, most probably ________.___
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Which of the following may lead to family quarrels according to the passage?___
A. Unawareness of energy cycles.
B. Familiar monologues.
C. A change in a family member's energy cycle.
D. Attempts to control the energy cycle of other family members.
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If one wants to work efficiently at his low point in the morning, he should __________.___
A. change his energy cycle
B. overcome his laziness
C. get up earlier than usual
D. go to bed earlier
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You are advised to rise with a yawn and stretch because it will __________.___
A. help to keep your energy for the day's work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
【单选题】
Which of the following statements is NOT true?___
A. Getting off to work with a minimum effort helps save one's energy.
B. Dr. Kletman explains why people reach their peaks at different hours of day.
C. Habit helps a person adapt to his own energy cycle.
D. Children have energy cycles, too.
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An effective way to prevent the burnout of young athletes is __________.___
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According to the passage sport is positive for young people in that __________.___
A. it can help them learn more about society
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C. it teaches them how to set realistic goals for themselves
D. it can provide them with valuable experiences
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Many coaches and parents are in the habit of criticizing young athletes __________.___
A. without realizing criticism may destroy their self-confidence
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C. believing that criticism is beneficial for their early development
D. so as to put more pressure on them
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According to the passage parents and coaches should __________.___
A. help children to win every game
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The author's purpose in writing the passage is _________.___
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D. to teach young athletes how to avoid burnout
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As pointed out at the beginning of the passage, people used to think that air pollution _______.___
A. cause widespread damage in the countryside
B. affected the entire eastern half of the United States
C. had damaged effect on health
D. existed merely in urban and industries areas
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As to the greenhouse effect, the author ________.___
A. share the same view with the scientist
B. is uncertain of its occurrence
C. rejects it as being ungrounded
D. thinks that it will destroy the world soon
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The underlined word "offset" in the second paragraph could be replaced by _________.___
A. slip into
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It can be concluded that ____________.___
A. raising the world's temperature only a few degrees would not do much harm to life on earth
B. lowering the world's temperature merely a few degrees would lead major farming areas to disaster
C. almost no temperature variations have occurred over the past decade
D. the world's temperature will remain constant in the years to come
【单选题】
This passage is primarily about __________.___
A. the greenhouse effect
B. the burning of fossil fuels
C. the potential effect of air pollution
D. the likelihood of a new ice age
【单选题】
What is the major function of paragraph 1?___
A. To arouse the reader's concern.
B. To introduce the theme of the whole passage.
C. To summarize the whole passage.
D. To state the primary uses of TV.
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Television, as a source of entertainment, is ________.___
A. not very convenient
B. very expensive
C. quite dangerous
D. relatively cheap
【单选题】
Why are some people against TV?___
A. Because TV programs are not interesting.
B. Because TV viewers are totally passive.
C. Because TV prices are very high.
D. Because TV has both advantages and disadvantages.
