Question

6．Nowadays，the food we eat seems to have great effects on our health．Although science has made enormous steps in making food more fit to eat，it has，at the same time，made many foods unfit to eat．Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well，especially cancer of the colon．Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures．
That food is reated to illness is not a new discovery．In 1945，government researchers realized that nitrates，commonly used to preserve color in meats，and other food additives，caused cancer．Yet，these carcinogenic additives remain in our food，and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful．The additives which we eat are not all so direct．Farmers often give penicillin to beef and living animals，and because of this，penicillin has been found in the milk of treated cow．Sometimes similar drugs are given to animals not for medical purposes，but for financial reasons．The farmers are simply trying to fatten the animals in order to obtain a higher price on the market．Although the Food and Drug Administration（FDA）has tried repeatedly to control these procedures，the practices continue．
46．Which of the following statements is NOT true？C
A．Some additives are added to the food itself and some are given to the living animals．
B．Researchers have known about the potential dangers of food additives for about sixty-eight years．
C．Drugs are always given to animals for medical reasons．
D．Food may cause forty percent of cancer in the world．
47．How has science done harm to mankind？D
A．Because of science，diseases caused by polluted food have been virtually eliminated．
B．It has caused a lack of information concerning the value of food．
C．The scientists have preserved the color of meats，but not of vegetables．
D．Because of the application of science，some potentially harmful substances have been added to food．
48．What are nitrates used for？A
A．They preserve the color of meats．
B．They preserve flavor in packaged foods．
C．They are the objects of research．
D．They cause the animals to become fatter．
49．The word"carcinogenic"most nearly means"C"．
A．trouble-making           B．color-retaining
C．cancer-causing           D．money-making
50．Which might be the best title of the passage？B
A．Drug and Food            B．Food and Health
C．Cancer and Health        D．Health and Drug．

Answer 1

分析 本文属于说明文阅读，作者通过这篇文章向我们讲述了不同的食物对人类健康的不同影响，不良的饮食可能会致癌，特别是现在食品中的添加剂，对人体是有害处的．

解答 46．C  细节理解题，根据第二段Sometimes similar drugs are given to animals not for medical purposes，but for financial reasons．可知有时类似的药物是给动物不是用于医疗目的，而由于财务原因，故选C．
47．D  推理判断题，根据第二段In 1945，about 68 years ago，government researchers realized that nitrates，commonly used to preserve color in meats，and other food additives，caused cancer．可知由于科学的应用，使一些潜在的有害物质被添加到食物中来了，故选D
48．A  细节理解题，根据第二段In 1945，government researchers realized that nitrates，commonly used to preserve color in meats，and other food additives，caused cancer．可知亚硝酸盐被用于保存肉的颜色，故选A．
49．C  词义猜测题，根据第二段根据In 1945，about 68 years ago，government researchers realized that nitrates，commonly used to preserve color in meats，and other food additives，caused cancer．Yet，these carcinogenic additives remain in our food，and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful．可知硝酸盐和其他的添加剂可诱发癌症，由此猜测出carcinogenic意思是致癌物，故选C．
50．B  主旨大意题，根据第一段Nowadays，the food we eat seems to have great effects on our health．可知这篇文章主要介绍了食品安全与健康，故选B．

点评 考查学生的细节理解和推理判断能力．做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．