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 本文屬于說明文閱讀，作者通過這篇文章向我們講述了不同的食物對人類健康的不同影響，不良的飲食可能會致癌，特別是現(xiàn)在食品中的添加劑，對人體是有害處的．

解答 46．C  細節(jié)理解題，根據(jù)第二段Sometimes similar drugs are given to animals not for medical purposes，but for financial reasons．可知有時類似的藥物是給動物不是用于醫(yī)療目的，而由于財務原因，故選C．
47．D  推理判斷題，根據(jù)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．可知由于科學的應用，使一些潛在的有害物質(zhì)被添加到食物中來了，故選D
48．A  細節(jié)理解題，根據(jù)第二段In 1945，government researchers realized that nitrates，commonly used to preserve color in meats，and other food additives，caused cancer．可知亞硝酸鹽被用于保存肉的顏色，故選A．
49．C  詞義猜測題，根據(jù)第二段根據(jù)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．可知硝酸鹽和其他的添加劑可誘發(fā)癌癥，由此猜測出carcinogenic意思是致癌物，故選C．
50．B  主旨大意題，根據(jù)第一段Nowadays，the food we eat seems to have great effects on our health．可知這篇文章主要介紹了食品安全與健康，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．