4．Eating hot dogs，ham and other processed meat can cause colorectal （直肠的） cancer，and eating red meat"probably"can also cause cancer，the World Health Organization's cancer agency reported Monday．
Kurt Straif of the International Agency for Cancer Research said the risk of developing colorectal cancer from eating processed meat remains small but rises with the amount consumed．Consuming red meat was linked to colorectal cancer，but the link was not as strong，the IARC report said．
"In view of the large number of people who consume processed meat，the global effect on cancer incidence is of public health importance，"Straif said．
"Red and processed meat are among 940agents reviewed by IARC and found to show some level of theoretical‘hazard'（危险），"institute spokeswoman Betsy Booren said．
Processed meat was defined as meat transformed through salting，curing，fermentation （发酵），smoking"or other processes to improve flavor or preservation．"The most common processed meats consumed in the U．S．include hot dogs，sausages，bacon，ham，canned meat and beef jerky （牛肉干）．
The IARC said it considered more than 800studies that investigated possible links between a dozen types of cancer with the consumption of red meat or processed meat in many countries and populations with diverse diets．
"The experts concluded that each 50gram portion-about 1.75ounce，or about two strips of bacon-of processed meat eaten daily increases the risk of colorectal cancer by 18%"，the IARC said．
IARC director Christopher Wild said the findings support current public health recommendations to limit intake of meat but stressed that red meat has nutritional value．He said governments and international regulatory agencies must balance the risks and benefits of eating red meat and processed meat"to provide the best possible dietary recommendations．"
28．What does the passage mainly want to tell us？D
A．Cancer results from meat．
B．People should stop eating processed meat．
C．Cancer can be prevented．
D．Eating too much processed meat does harm to us．
29．Why is meat salted，cured or smoked？A
A．To make meat taste better or preserved longer．
B．To add the weight of meat．
C．To cheat the consumers．
D．To process more meat．
30．We can infer from the passage the IARC drew the conclusion thatC．
A．red and processed meat is dangerous only if you eat it
B．there will be more studies about the links between meat and cancer
C．processed meat was harmful according to hundreds of studies
D．public health is becoming worse because of the consumption of meat
31．What's Christopher Wild's attitude towards red meat？B
A．It is full of nutrition so it should be eaten．
B．People should control their consumption of it．
C．The way of eating red meat varies from one to another．
D．The government should give people proper suggestions about how to cook meat．
分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了研究证明吃太多加工过的肉对我们有害．
解答 28．D．推理判断题．根据第一段Eating hot dogs，ham and other processed meat can cause colorectal （直肠的） cancer，and eating red meat"probably"can also cause cancer可知这篇文章主要想告诉我们吃太多加工过的肉对我们有害；故选D．
29．A．细节理解题．根据文章Processed meat was defined as meat transformed through salting，curing，fermentation （发酵），smoking"or other processes to improve flavor or preservation可知肉是咸的，是腌的还是熏的是为了使肉的味道更好或保存更长；故选A．
30．C．细节理解题．根据倒数第二段The experts concluded that each 50gram portion-about 1.75ounce，or about two strips of bacon-of processed meat eaten daily increases the risk of colorectal cancer by 18%"，the IARC said可知根据数以百计的研究加工过的肉对身体有害；故选C．
31．B．推理判断题．根据最后一段．He said governments and international regulatory agencies must balance the risks and benefits of eating red meat and processed meat"to provide the best possible dietary recommendations可知Christopher Wild认为人们应该控制对肉类的消费；故选B．
点评 考察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，再做出正确的选择．在做推理判断题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．
