Question

19．Food sometimes gets poisoned with harmful things．A person who eats such food can get an illness called food poisoning．Food poisoning is usually not serious，but some types are deadly，The symptoms of food poisoning usually begin within hours of eating the poisoned food．Fever is one of the most common symptoms．
     Certain microorganisms （微生物） cause most types of food poisoning．Bacteria and other microorganisms can poison eggs，meat，vegetables，and many other foods．After entering the body，these tiny living things release （释放） poisons that make people sick．
      Some chemicals can also cause food poisoning．They are often added to food while it is being grown，processed，or prepaid．For example，many farmers spray chemicals on crops to kill weeds and insects．Some people may have a bad reaction to those chemicals when they eat the crops．
      Some plants and animals contain natural poisons that are harmful to people．These includecertain kinds of seafood，grains，nuts，seeds，beans，and mushrooms．
      When people handle food properly，the risk of food poisoning is very small Microorganisms multiply rapidly in dirty places and in warm temperatures．This means that people should never touch food with ditty hands or put food on unwashed surfaces．Food should be kept in a refrigerator to stop microorganisms from gnawing．Meat needs to be cooked thoroughly to kill any dangerous microorganisms．People should also wash food covered with chemicals before eating it．Finally，people should not eat raid mushrooms or other foods that grow in the wild．Some of these foods may contain natural materials that are poisonous to humans．In addition，some types of fish can be poisonous．
      Most people recover from food poisoning after a few days of resting and drinking extra water．If people eat natural poisons，they must go to the hospital right away to have their stomachs emptied．

51．Which of the following statements is NOT true？B
A．Food when poisoned can make people sick．
B．Food poisoning means death．
C．Food poisoning comes in varieties．
D．Food poisoning can be serious．
52．We know from the passage that the symptoms of food poisoningC
A．are always accompanied by a fever
B．are too common to be noted
C．can be noticed within hours
D．can be ignored
53．Food poi soning can be caused by all the following EXCEPTB
A．some chemicals       B．low temperatures 
C．some tiny living things  D．certain natural materials
54．From Paragraph 5，we can learn thatD
A．mushrooms should not be eaten
B．vegetables are safer than meat and seafood
C．natural poisons are more dangerous than chemicals
D．different types of food should be handled differently
55．It can be inferred from the passage thatC
A．natural materials are safe in food processing
B．chemicals are needed in food processing
C．food poisoning can be kept under control
D．food poisoning is out of control．

Answer 1

分析 本文属于说明文阅读，作者通过这篇文章向我们说明了什么是食物中毒，纠正了以前人们认为食物中毒代表死亡的错误观点，介绍了食物中毒的原因，症状，以及如何预防食物中毒，告诉读者只要按照正确方法保存食物，那食物中毒是可以被控制的．

解答 51．B  细节理解题，根据第一段Food poisoning is usually not serious，but some types are deadly，可知 食物中毒通常不严重，但是有些是致命的，因此食物中毒并不意味着死亡，故选B．
52．C  细节理解题，根据第一段The symptoms of food poisoning usually begin within hours of eating the poisoned food．Fever is one of the most common symptoms．可知食物中毒的症状会在几小时内被注意到，发烧是常见症状之一，故选C．
53．B  细节理解题，根据第五段Food should be kept in a refrigerator to stop microorganisms from gnawing．可知食物应该被保存在冰箱中防止微生物生成，因此低温不会导致食物中毒，故选B．
54．D  推理判断题，根据第五段When people handle food properly，the risk of food poisoning is very small Microorganisms multiply rapidly in dirty places and in warm temperatures．可知如果人们正确的处理食物那么食物中毒的几率会非常小，可以推测出不同类型的食物应以不同的方式处理，A项说得太绝对，BC在文中不能找到对应细节，故选D．
55．C  推理判断题，根据第五段When people handle food properly，the risk of food poisoning is very small Microorganisms multiply rapidly in dirty places and in warm temperatures．可知如果人们正确的处理食物，食物中毒的几率就会非常小，因此说明食物中毒是可以被控制的，故选C．

点评 做阅读理解时要快速的浏览全文，把握文章主旨大意，带着问题回到原文，寻找细节或概括相应的答案，最后要理清作者写作思路．