Question

13．Beijing is hardly alone in its air pollution problems．The world Health Organization has said that roughly half of the world's urban population is exposed to pollution at least 2.5 times higher than it recommends．
While it may take years to fix this global problem，innovative minds in the Asia region have come up with creative solutions for living with air pollution．
DIY Purifier
Thomas Talhelm started worrying about the air inside his Beijing home during"airpocalypse"（空氣末日） in 2013 when Beijing's air quality index skyrocketed to a terrifying 755．
The scholar couldn't afford the luxury of an expensive air purifier．"Filters （過濾器） are actually very simple-a high efficient filter is all you need to get over 96% of the PM2.5，"he said．
With three of his friends，Talhelm created Smart Air，an air purifier consisting of a basic household fan with a high efficient filter attached to it．
It works as efficiently as the big brands selling for thousands of dollars，removing more than 90 percent of PM2.5 in your room，according to Talhelm's research．
Invisible Mask
Infipure's"nose mask"claims to cut 99% of PM2.5 without the trouble of a surgical face mask．
The filters，made from special materials，are inserted into your nose and aim to be undetectable．
"People care about their health，but don't want all the downsides that come with a traditional face mask，"Infipure co-founder Francis Law explained．
Plant Backpack
Taiwanese artist Chui Chih has designed a survival device for an apocalyptic world．
Named Voyage on the Planet，a potted plant is housed inside a clear backpack hooked up to two tubes to bring fresh air to a face mask．It's a bold，abstract idea from an oxygen tank．
Smog Vacuum
Daan Roosegaarde has been working on a smog vacuum that will suck pollutants from the sky to the ground like a vacuum，making way for clean air．
A byproduct of this smog vacuum，namely The Smog Free Tower，is the"smog ring"-a piece of jewelry made from smog particulates（微粒）．
"The pollution we suck up，the small particulates，we don't throw them away．We put them under pressure for a couple of weeks and they crystallize，creating something like a diamond，"Roosegaarde explains．
 
70．Thomas Talhelm invented Smart Air for all the following reasons exceptD．
A．the high price of the big brands
B．the help from three of his friends
C．the poor quality of the indoor air
D．the simple principle behind the device
71．If someone wants to travel around in those polluted days，which product will he most probably choose for the sake of convenience？B
A．Smart Air．
B．Infipure's nose mask．
C．Voyage on the Planet．
D．The Smog Free Tower．
72．In which solution the inventor also makes use of the dust collected from the polluted air？D
A．DIY Purifier．
B．Invisible Mask．
C．Plant Backpack．
D．Smog Vacuum．

Answer 1

分析 本文屬于說明文閱讀，作者在文章中向我們說明了如今世界上的空氣污染越來越嚴重，并向我們介紹了四個不同的對抗空氣污染的裝置，分別介紹了它們的功能以及適用范圍，使讀者能選擇適合自己的裝置．

解答 70．D  細節(jié)理解題，根據(jù)第三段when Beijing's air quality index skyrocketed to a terrifying 755；The scholar couldn't afford the luxury of an expensive air purifier；第四段With three of his friends可知Thomas Talhelm 發(fā)明這個有他三個朋友的幫助，北京的室內(nèi)空氣質(zhì)量很差，大品牌的價格高，但是沒有包括設(shè)備背后的簡單原則，故選D．
71．B  細節(jié)理解題，根據(jù)第七段Infipure's"nose mask"claims to cut 99% of PM2.5 without the trouble of a surgical face mask．The filters，made from special materials，are inserted into your nose and aim to be undetectable．可知Infipure's nose mask可以減少可吸入顆粒物，它能被插到鼻子上，因此適合外出旅行，故選B．
72．D  細節(jié)理解題，根據(jù)最后一段The pollution we suck up，the small particulates，we don't throw them away．We put them under pressure for a couple of weeks and they crystallize，creating something like a diamond可知Smog Vacuum利用了被污染的空氣中的細小顆粒，將它們放在低壓下，使他們的結(jié)晶看起來像一顆顆鉆石，故選D．

點評 考查學生的細節(jié)理解和推理判斷能力．做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確選擇．在做推理判斷題時不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進行合乎邏輯的推理判斷．