【判断题】【消耗次数:1】
3GPP要求LTE在20M带宽下的下行峰值速率为100Mbps,上行为30Mbps( )
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相关题目
【单选题】 100Mbps网卡的数据传输速度为( )。
①  1.25MB/s
②  12.5MB/s
③  100MB/s
④  125MB/s
【单选题】 100Mbps网卡的数据传输速度为( )。
①  1.25MB/s
②  12.5MB/s
③  100MB/s
④  125MB/s
【单选题】 交换机端口可以分为半双工与全双工两类。对于100Mbps的全双工端口,端口带宽为
①  100Mpbs
②  200Mbps
③  400Mpbs
④  800Mpbs
【单选题】 某一速率为100M的交换机有20个端口,则每个端口的传输速率为 ()。
①  10M
②  100M
③  5M
④  2000M
【判断题】 ADSL的上行通道和下行通道的速率是不一样的。
①  正确
②  错误
【单选题】 ADSL的下行速率可达()
①  64Kbps
②  144Kbps
③  2Mbps
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【单选题】 TD-LTE技术能够提供的理论最高下载速率在什么速率级别_______。
①  百兆比特/每秒
②  兆比特/每秒
③  比特/每秒
④  吉比特/每秒
【判断题】 水厂的日常检查范围为围墙外20m以内的设施、设备、建筑物。
①  正确
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【单选题】 有10台计算机建成10Mbps以太网,如分别采用共享以太网和交换以太网技术,则每个站点所获得的数据传输速率分另为()。
①  10Mbps和10Mbps
②  10Mbps和1Mbps
③  1Mbps和10Mbps
④  1Mbps和1Mbps
【单选题】 将一水池中20℃的水用泵输送到一敞口高位槽中,两液面之间的垂直距离为20m,泵的吸入口在水池液面上方2 m处。在某送液量下, 泵对水作功219.6J/kg,管内摩擦系数λ为0.018,吸入管路总长为40 m,压出管路总长为70m(两长度包括全部局部阻力的当量长度在内),输水管尺寸为Ф108 ×4mm,泵的效率为70%。已知20℃水的密度为1000kg/m3试求:(1)输水量,m3/h 。(2)泵的轴功率。
①  Q=43.52m^3/hN=9.45Kw
②  Q=53.72m^3/hN=3.79Kw
③  Q=43.52m^3/hN=3.79Kw
④  Q=53.72m^3/hN=9.45Kw
随机题目
【单选题】 4. Our room must ___ clean.
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②  be kept
③  to be kept
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【单选题】 8.Doctors ___ in every part of the world.
①  need
②  are needing
③  are needed
④  will need
【单选题】 3. This English song___ by the girls after class.
①  often sings
②  often sang
③  is often sang
④  is often sung
【单选题】 9.His new book___ next month.
①  will be published
②  is publishing
③  is being published
④  has been published
【单选题】 5 -Id like to buy that coat. -Im sorry. ___.
①  it sold
②  its selling
③  Its been sold
④  it had been sold
【单选题】 2. English ____ in Canada.
①  speaks
②  are spoken
③  is speaking
④  is spoken
【单选题】 7.The key ___ on the table when I leave.
①  was left
②  will be left
③  is left
④  has been left
【单选题】 10. These papers___yet.
①  have not written
②  have not been written  
③  has not written
④  has not been written
【单选题】 1. The Peoples Republic of China ___ on October 1, 1949.
①  found
②  was founded
③  is founded
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【判断题】 阅读课文II.Which Is Stronger? 判断正误4. According to the Text, the Wind was a nice person who alwyas had a kind word for everyone.
①  正确
②  错误