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【单选题】
NB-IoT系统中,信道带宽 (channel bandwidth) 为( )。
A. 3.75KHz
B. 180KHz
C. 15KHz
D. 1.4MHz
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答案
B
解析
暂无解析
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NB-IoT基于竞争的随机接入过程中,UE如何获取NPRACH的信息( )。
A. 监听SIB2-NB获取NPRACH资源信息
B. 通过eNB随机下发
C. 通过preamble获取
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CE Level分为几个等级?( )
A. 1
B. 3
C. 2
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5G的愿景是( )。
A. 信息随心至,万物触手及
B. 高速率,高可靠
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以下哪个是用于SRS传输的PHR?( )
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B. Type3
C. Type2
D. Type4
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PUCCH有几种格式?( )
A. 3种
B. 5种
C. 4种
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未来的车联网不仅包括车与网络之间的远程通信,还包括车车.车路.车人的频繁交互的短程通信,这些短程通信统称为?( )
A. V2A
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C. V2N
D. V2X
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LTE测量NR,测量的基本单位是:( )
A. 小区
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C. Beam
D. PLMN
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每个RO上可用的Preamble个数是:( )
A. 16个
B. 64个
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D. 128个
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AperiodicCSI Reporting可以由什么配置触发和激活?( )
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第5代移动通信系统是( )制式的系统。
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下列哪个不是切换的步骤?( )
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在CDMA2000 系统中, 由于增加了哪个信道, 从而使得手机电池能有更长的待机时间?( )
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CDMA2000 1x系统,移动台通话结束后会进入( )状态。
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以下各项中对手机接收功率不产生影响的是( )。
A. 路径损耗
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当建立一个以太网连接时,需要连接两个 以太网段,使用哪种以太网技术完成该任务? ( )
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你对天线的增益(dBd)是如何认识的? ( )
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B. 天线是无源器件,不可能有增益,所以此值没有实际意义
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【单选题】
多径信号合成后其相位服从( )
A. 对数正态分布
B. 均匀分布
C. 瑞利分布
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【单选题】
1个64QAM调制的符号代表( )位信息比特。
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定向天线方位角误差不大于( )。
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避雷针要有足够的高度,能保护铁塔或杆上的所有天线,所有室外设施都应在避雷针的( )度保护角之内。
A. 90
B. 45
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【单选题】
在下列给出的协议中,不是 TCP/IP 的应用层协议的是( )。
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【单选题】
LTE下行覆盖能力最强的控制信道是:( )
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频内测量释放的时机是( )。
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下面协议子层不属于控制面的是:( )。
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下列哪个信号属于LTE上行参考信号( )。
A. PSS
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基于负荷的测量事件是( )。
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【单选题】
单站检查不包括以下哪项工作?( )
A. 制定日报和周报,以及下周工作计划
B. 前后台配置及告警检查
C. 天馈系统和无线参数检查
D. 性能检查
【单选题】
关于基于非竞争的随机接入说法不正确的是( )。
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以下哪个参数用于切换控制?( )
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B. sNonintraSearch
C. sIntraSearch
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LTE下行覆盖受限信道是:( )
A. PCFICH
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以下哪些不是LTE切换技术特点?( )
A. 软切换
B. 后向切换
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【单选题】
机械下倾只是在架设时倾斜天线,多用于角度小于( )的下倾,当再进一步加大天线下倾的角度时,覆盖正前方出现明显凹坑,两边也被压扁,天线方向图畸变,引起天线正前方覆盖不足同时对两边基站的干扰加剧。
A. 20°
B. 10°
C. 5°
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The direct cause for the Religious Reformation was King Henry VIII’s effort to .
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The English Civil War broke out in 1642 between .
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British Cabinet works on the principle of .
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Of the following writers, is Not a Nobel Prize winner.
A. A. Alice Walker
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Of the following books, is NOT written by Ernest Hemingway.
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【单选题】
Of the following writers, is NOT included in the group of naturalists.
A. A. Stephen Crane
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Of the following, is NOT characteristic of Mark Twain’s works.
A. A. colloquial speech
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【单选题】
Of the following, is considered Herman Melville’s masterpiece.
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【单选题】
Of the following, is NOT Nathaniel Hawthorne’s work.
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【单选题】
is regarded as “the father of American literature”.
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C. C. Thomas Jefferson
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Of the following writers, are from the Colonial and Revolutionary Periods.
A. A. Benjamin Franklin & Edgar Ellen Poe
B. B. Edgar Ellen Poe & Jonathan Edwards
C. C. Benjamin Franklin & Jonathan Edwards
D. D. Edgar Ellen Poe & Washington Irving
【单选题】
The National Day of the United States falls on .
A. A. June 4th
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【单选题】
Of the following, is NOT among the three major radio and TV networks in America.
A. A. the National Broadcasting System (NBS)
B. B. the Public Broadcasting Service (PBS)
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is sold especially to the upper or upper-middle class and it has a reputation for its serious attitude and great bulk.
A. A. The Washington Post
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【单选题】
Of the following universities, has NOT cultivated any American President yet.
A. A. Harvard University
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To get a bachelor’s degree, all undergraduate students are required to do the following except .
A. A. attending lectures and completing assignments
B. B. passing examinations
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D. D. earning a certain number of credits
【单选题】
Of the following, is NOT the responsibility of the board of trustees in U. S. institutions.
A. A. choosing the president
B. B. establishing policies for administrators and faculty
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D. D. decide which student to enroll
【单选题】
Of the following, are NOT among the categories of American higher education.
A. A. universities and colleges
B. B. research institutions
C. C. technical institutions
D. D. community colleges
【单选题】
Higher education in the United States began with the founding of
A. A. Yale University
B. B. Harvard University
C. C. Princeton University
D. D. New York University
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Of the following subjects, are NOT offered to elementary school students.
A. A. mathematics and languages
B. B. politics and business education
C. C. science and social studies
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Formal education in the United States consists of , secondary and higher education.
A. A. kindergarten
B. B. public
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【单选题】
At present, U. S. exports account for of the world’s total.
A. A. 10%
B. B. 15%
C. C. 20%
D. D. 25%
【单选题】
is not one of the three giants in American automobile industry.
A. A. Ford
B. B. General Motors
C. C. Chrysler
D. D. American Motors
【单选题】
The following statements are all true except .
A. A. Agribusinesses reflect the big, corporate nature of many farm enterprises.
B. B. Agribusinesses maintain a balanced trade pattern between agricultural imports and exports.
C. C. Agribusinesses range from one-family corporations to multinational firms.
D. D. Agribusinesses include a variety of farm businesses and structures.
【单选题】
About of American crops are for export.
A. A. half
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D. D. one fifth
【单选题】
President Johnson tried to build a “Great Society” by introducing various programs like the following except .
A. A. Medicare
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C. C. Education Initiatives
D. D. Unemployment Pension
【单选题】
The following inventions took place during the “second indThe following inventions took place during the “second industrial revolution” except .
A. A. typewriter
B. B. telephone
C. C. electric light
D. D. refrigerator
【单选题】
The first National Bank of the United States was established with the urge of .
A. A. George Washington
B. B. Thomas Jefferson
C. C. Andrew Jackson
D. D. Alexander Hamilton
【单选题】
Chartered companies were NOT granted the by the British King or Queen.
A. A. political authority
B. B. economic rights
C. C. judicial authority
D. D. diplomatic authority
【单选题】
The modern American economy progressed from to , and eventually, to .
A. A. colonial economy, handcraft economy, industrial economy
B. B. farming economy, handcraft economy, industrial economy
C. C. colonial economy, farming economy, industrial economy
D. D. handcraft economy, farming economy, industrial economy
【单选题】
America produces a major portion of the world’s products in the following fields except .
A. A. machinery
B. B. automobiles
C. C. ore
D. D. chemicals
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