Question

1．As long as you have broadband（寬帶）service in your home，you can turn on your desktop computer and connect to the Internet．If you have a wireless router（路由器），a device that spreads the broadband connection to other devices，you can set up a Wi-Fi network，which enables your cellphone and tablets to go online too．And when you are outdoors where there is no Wi-Fi，such as in the park or at the beach，having 3G service allows you to stay connected．
    It seems that lots of us already have Internet coverage everywhere we go．So why have mobile companies around the world lately been so enthusiastic about a new term，"4G"？First，you need to know that the letter"G"stands for"generation"．Even if you have no idea what 4G is，at least you can figure out that it's a step up from 3G since it's the latest generation of mobile internet service．
Unlike broadband，mobile Internet uses the same signal towers that provide voice service to your cell phone，which means wherever you can make phone calls with your cell phone you also have an Internet connection．
But mobile connections have theirdefects：they don't carry as much information as broadband does，making opening websites and downloading music slower than they are on a Wi-Fi connection．This is why mobile connections have been constantly upgraded since the first generation was launched back in the l980s．
    According to BBC，4G is five to seven times faster than current 3G network speeds，almost as fast as home broadband．Because of this，4G is ideally suited for services like video downloading，mapping，online shopping and even video conferencing．
    To achieve the high speeds，network companies have to spend a lot of money on building new signal towers，which will eventually lead to a higher phone bill if you switch t0 4G，and you'll also have to get a new phone with 4G capacity．

56．What is Paragraph l mainly about？D
A．The development of Wi-Fi．
B．The convenience of using cellphones．
C．The influences of the Internet on our life．
D．Various ways to get access to the Intemet．
57．The underlined word"defects''in Paragraph 4 probably meansA．
A．disadvantages    B．functions    C．qualities   D．benefits
58．What is the weakness of 3 G compared with 4G？C
A．Its voice is not as clear as 4G．
B．It can't satisfy the users'basic needs．
C．Its network speeds are much slower．
D．It has much less popularity than 4G．
59．Mobile technology has constantly been improved toB．
A．replace broadband        B．increase the network speed
C．download videos         D．connect more cellphones
60．What does the author think of 4G service？D
A．Its service is worth the price
B．There is no need to develop it
C．It takes time to be widely used
D．It provides good service at a higher price．

Answer 1

分析 本文是科教類的說明文，文章向讀者介紹了4G．
  只要有寬帶，在家里無論是臺式電腦還是手機都可以上網；當你在戶外沒有Wi-Fi的地方，3G可以提供服務．似乎無論去哪里都有網絡覆蓋，那么為什么還要4G呢？
   4G是由3G發(fā)展而來；與寬帶不同的是，移動網絡的運用的信號塔同時提供手機的聲音服務；這就意味著有手機連接的地方就有網絡連接．但是移動連接也有它的缺陷：它開網和下載音樂比Wi-Fi慢．這就是移動網一直在升級的原因．
    據(jù)BBC報導，4G的運行速度比3G快5到7倍，所以非常適合于視頻下載、繪圖和網上購物．為了提高速度，網絡公司需要花費大量的資金建新的信號塔，這就最終導致費用的上漲．

解答 56．D．段落大意題．第一段向我們介紹了利用寬帶、路由器和3G等進行網絡連接的方式，由此判斷，第一段主要講的是我們可以通過各種方式連接到網絡．故選D．
57．A．詞義猜測題．根據(jù)其后面的"They don't carry as much information as broadband does"可知，該詞的意思相當于"disadvantage"．故選A．
58．C．推理判斷題．從第五段的"4G is five to seven times faster than current 3G network speeds"可知C項符合題意．
59．B．細節(jié)理解題．從第四段的"…．This is why mobile connections have been constantly upgraded since the first generation was launched back in the 1980s"可知，前面的"making opening websites and downloading music slower than they are on a Wi-Fi connection"是具體的原因，所以推斷其目的是為了提高網絡運行的速度．故選B．
60．D．推理判斷題．從最后一段的"which will eventually lead to a higher phone bill if you switch to 4G，and you will also have to get a new phone with 4G capacity"可知，4G網絡的使用的成本比較高．故選D．

點評 本文是科技說明文，文章介紹了移動網絡和寬帶的差別已經運行4G的原因．要在整體理解的基礎上關注細節(jié)無論是細節(jié)題和是推斷題都要以文章的內容為依據(jù)進行推斷．