期末复习阅读理解提优练习（试题）译林版（三起）英语六年级上册

六上期末复习阅读理解提优练习（3） （A） Why is 5G so fast?5G为什么这么快? Ideally the speed of 5G can be up to 10GB per second. It can download(下载) a 10GB film in just 9 seconds. How can 5G be so fast? Here are the secrets. Millimetre wave(毫米波) 5G uses a special kind of radio wave(无线电波)一a millimetre wave. It can send more signals(信号) and data at a time. This gives 5G its fast speed.Satellites(卫星)and radar systems(雷达系统) also use millimetre waves. Micro base station(微基站) A base station sends and receives signals to and from your mobile phone. 4G uses big base stations. Building these stations is expensive. The stations take up a lot of space. But 5G uses many micro base stations. They are smaller and better-looking.They can cover many different places and send out more signals. D2D technology(设备到设备技术) You send a photo to your friend face to face through your 4G mobile phone. He or she can receive it at once. But actually, the photo has to go to the base station first. The base station then sends it to your friend.When you use 5G, the photo will not go to a base station.It will go directly(直接地) to your friend's mobile phone.Your friend receives the photo much faster. This is D2D technology. ( )1.5G can download a 10GB film in just_________. A. 9 minutes B. 9 hours C. 9 days D. 9 seconds ( )2._______uses a special kind of radio wave—a millimetre wave. A.5G B.4G C.3G D.2G ( ) 3.We build a______to send and receive signals. A.factory B. satellite C. base station D.radar system 重点句型及难句分析 Ideally the speed of 5G can be up to 10GB per second. 句意:5G的理想速度是每秒 10GB。 second是名词,意为“秒”;作数词,意为“第二”。 【词汇拓展】 1. the speed of.... .....的速度 speed n.速度 2.second n.秒/第二 3.secret n.秘密 secrets(复数) 4. a special kind of...一种特殊的... special adj特殊的 5. signal n信号 6.take up a lot of space. space 不可数n.空间 take up占据/用 7.cover v.覆盖/包括 8. receive v.接受/收 9.technology n.科技. （B） Cardboard bicycles纸板自行车 Izhar Gafni is a designer(设计师) in lsrael. He likes cycling when he is fre