13．With the crazy smog going on in China，businessmen are now ready to grope for your wallet．"Smog economy"is stimulating a shopping spree on certain products against the terrible weather．Now let's see what we have on the list to help us through the crisis．
1．Masks
Well，I would say you had better stay indoors to save your lives．PM 2.5 just surged up to 750 in Beijing recently.3M just sold 220，000 masks of a kind．No.1 best-selling products!
2．Air purifiers
This kind of products is rarely seen in Chinese households in the past．They have become a necessity now．I do like these little gadgets，but they are just too expensive．
3．Oxygen inhalers
I didn't realize oxygen inhalers also get a cut in the smog economy．As a matter of fact，your oxygen uptake has nothing to with relieving （減輕） the impact of smog．It might even lead to oxygen poisoning when you inhale too much oxygen．So don't get greedy．
4．Salt lamps
Compared to oxygen inhalers，salt lamps are even worse．Some stores are selling the products at several hundred yuan，saying that they can release negative ions（離子），reduce radiation levels and purify the air．The lamps mainly contain sodium chloride．The boiling point of sodium is about 800 degrees centigrade and that of candle is 500．So how on earth can negative ions be released at only 500 degrees？
5．Plants that absorb smog
Yeah，right．Plants Vs Smog．It is scientifically justified （證明） that some plants do absorb pollutants from the air．Money plants and calla lilies are among the best-sellers in the market．Even if they don't work，it's good to have some plants in the house anyway．

43．According to the passage，smogA．
A．give some economic chances to businessmen
B．is very bad to economy
C．makes some crisis come out
D．have nothing to do with the economy
44．What is the meaning of the underlined word？D
A．Giving up shopping
B．Feeling down in shopping．
C．Having a lot to buy
D．Buying something enthusiastically．
45．Salt lamps are useless，becauseB．
A．it may cause poisoning
B．it actually can't release the negative ions
C．it reduces radiation level and makes the air dirty
D．the prize is very high
46．How many ways does the author think are useful？B
A.2．B.3．C.4．D.5．

分析 本文屬于說明文閱讀，作者通過這篇文章向我們介紹了霧霾天氣給人們的健康造成危害，然而卻給商家?guī)頇C會，作者例舉了一些和大霧有關的產(chǎn)品，并一一說明它們的功能，以及是否真的對霧霾有用．

解答 43．A  細節(jié)理解題：根據(jù)文章第一段With the crazy smog going on in China，businessmen are now ready to grope for your wallet．可知大霧給商人帶來了盈利的機會，故選A．
44．D  詞義猜測題：根據(jù)第一段Smog economy"is stimulating a shopping spree on certain products against the terrible weather．可知"大霧經(jīng)濟"激發(fā)了人們的購買熱情，由此可推知"spree"的意思是"熱情的購買東西"，故選D．
45．B  細節(jié)理解題：根據(jù)第五段So how on earth can negative ions be released at only 500 degrees？可知鹽燈對我們是沒有用的，因為它實際上并不能釋放負離子，故選B．
46．B  細節(jié)理解題：通讀全文可知作者認為口罩，空氣凈化器，和植物都是能夠對大霧有用的，所以一共是3種，故選B．

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．

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