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1、20152015 拉萨市高考英语阅读理解、书面表达自练（拉萨市高考英语阅读理解、书面表达自练（7 7）答案（三月）答案（三月）阅读理解。【2014江西高安中学模拟】Mouth bacteria grow fast in airless conditions.Oxygen rich saliva (唾液) keeps their numbers down.When we sleep，for example，the saliva stream slows，and sulfur (硫) producing bacteria gains the upper hand，producing classic
2、 “morning breath”Alcohol drinking，too much talking，breathing through the mouth during exercise，anything that dries the mouth produces bad breath.So can stress，though its not understood why.Some peoples breath turns sour every time they go on a job interview.Saliva flow gradually slows with age，which
3、 explains why the elderly have more bad breath trouble than younger people do.Babies.however，who make plenty of saliva and whose mouths contain relatively few bacteria have characteristically sweet breath.For most of us，the simple，dry mouth variety of bad breath is easily cured.Eating or drinking st
4、arts saliva and sweeps away many of the bacteria.Breakfast often stops morning breath.Those with constant dry mouth find that it helps to keep gum，hard candy，or a bottle of water or juice around.Brushing the teeth wipes out dry mouth bad breath because it clears away many of the offending bacteria.S
5、urprisingly，one thing that rarely works is mouthwash.The liquid can mask bad breath smell with its own smell，but the effect lasts no more than an hour.Some mouthwashes claim to kill the bacteria responsible for bad breath.The trouble is，they dont necessarily reach all offending germs.Most bacteria a
6、re well protected from mouthwash under thick layers of mucus (粘液)If the mouthwash contains alcoholas most doit can worsen the problem by drying our mouth.1Which of the following is right?ASaliva flow gradually increases with age.BAlcohol drinking does good to bad breath.CMouthwash is not an effectiv
7、e way to bad breath.DMouth bacteria cant grow fast in airless conditions.2Which of the following is mentioned as one of the causes of bad breath?ATooth trouble. BSulfur rich food.CToo much exercise. DMental pressure.3According to the passage，alcohol has something to do with bad breath mainly because
8、_.Ait keeps offending bacteria from reproducing Bits smell adds to bad breath Cit kills some helpful bacteria Dit affects the normal flow of saliva4Mouthwashes are not an effective cure for bad breath mainly because_.Athey cant mask the bad odor long enoughBthey cant get to all the offending bacteri
9、aCtheir strong smell mixes with bad breath and makes it worseDthey cant cover the thick layers of mucus5We can infer from this passage that_.Aoffensive breath cant easily be curedBelderly people are less offended by bad breathCheavy drinkers are less affected by bad breathDoffensive breath is less a
10、ffected by alcohol语篇解读 本文是一篇说明文。说明了口气(臭)的原因，虽然有些治疗措施，但是都不能从根本上治愈。1解析： 细节理解题。根据最后一段第二句“The liquid can mask bad breath smell with its own smell，but the effect lasts no more than an hour.”可知，答案选 C。答案： C2解析： 细节理解题。根据第二段第二句“So can stress，though its not understood why.”可知，答案选 D。答案： D3解析： 推理判断题。根据第一段“Mouth
11、 bacteria grow fast in airless conditions.the saliva stream slows.producing classic morning breath ”可知，在没有新鲜空气的情况下，唾液流动会缓慢，口腔细菌会增加。由此结合第二段第一句“Alcohol drinking.dries the mouth produces bad breath.”可知，喝酒会使人口干舌燥，造成唾液流动缓慢，从而产生口臭。答案： D4解析： 细节理解题。根据最后一段第四句“The trouble is，they dont necessarily reach all of
12、fending germs.”可知，故答案选 B。答案： B5解析： 推理判断题。文中提到了一些治疗方法，比如口香糖、硬糖、漱口剂等，但是都不能有效根治口臭。答案： A。阅读理解。The record rise in world food prices last month is not only a start to a possible “food price shock“ in the coming months, but also an obvious warning that the international community cannot afford to ignore. T
13、he fearful consequences of long-term climate change are more closing now and divided response to the global financial crisis could make them worse. Early this week, the United Nations Food and Agricultural Organization announced that its benchmark food price index had jumped to 214.7 points in Decem
14、ber, above the previous peak of 213.5, which was set in June 2008 and caused food riots(暴乱) in some poor countries. With the world economy showing little sign of emerging out of the mess any time soon, the record increase in food prices is certainly shocking. The 2008 food crisis was a “silent tsuna
15、mi“ for the worlds poor. So, what will happen if food prices remain high over the next several months? The obvious answer is: The number of hungry people across the world, about 1 billion according to UN estimates, will almost certainly increase. Hence, the international community should prepare to
16、solve a food crisis similar to that in 2008. For the moment, that means policymakers across the globe should make joint efforts to prevent panic over food prices both at home and in the global market. But to prevent such food crises from happening again, the international community must first recognize that our future is likely to be affected by extreme weather more seriously than feared earlier if we continue to drag o
