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(shuō)明文，文章向讀者介紹了4G．
  只要有寬帶，在家里無(wú)論是臺(tái)式電腦還是手機(jī)都可以上網(wǎng)；當(dāng)你在戶外沒(méi)有Wi-Fi的地方，3G可以提供服務(wù)．似乎無(wú)論去哪里都有網(wǎng)絡(luò)覆蓋，那么為什么還要4G呢？
   4G是由3G發(fā)展而來(lái)；與寬帶不同的是，移動(dòng)網(wǎng)絡(luò)的運(yùn)用的信號(hào)塔同時(shí)提供手機(jī)的聲音服務(wù)；這就意味著有手機(jī)連接的地方就有網(wǎng)絡(luò)連接．但是移動(dòng)連接也有它的缺陷：它開(kāi)網(wǎng)和下載音樂(lè)比Wi-Fi慢．這就是移動(dòng)網(wǎng)一直在升級(jí)的原因．
    據(jù)BBC報(bào)導(dǎo)，4G的運(yùn)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(wǎng)上購(gòu)物．為了提高速度，網(wǎng)絡(luò)公司需要花費(fèi)大量的資金建新的信號(hào)塔，這就最終導(dǎo)致費(fèi)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(jìn)行網(wǎng)絡(luò)連接的方式，由此判斷，第一段主要講的是我們可以通過(guò)各種方式連接到網(wǎng)絡(luò)．故選D．
57．A．詞義猜測(cè)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(dāng)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(xiàng)符合題意．
59．B．細(xì)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(wǎng)絡(luò)運(yùn)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(wǎng)絡(luò)的使用的成本比較高．故選D．

點(diǎn)評(píng) 本文是科技說(shuō)明文，文章介紹了移動(dòng)網(wǎng)絡(luò)和寬帶的差別已經(jīng)運(yùn)行4G的原因．要在整體理解的基礎(chǔ)上關(guān)注細(xì)節(jié)無(wú)論是細(xì)節(jié)題和是推斷題都要以文章的內(nèi)容為依據(jù)進(jìn)行推斷．