4．Eating hot dogs，ham and other processed meat can cause colorectal （直腸的） 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'（危險(xiǎn)），"institute spokeswoman Betsy Booren said．
Processed meat was defined as meat transformed through salting，curing，fermentation （發(fā)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 本文屬于說明文閱讀，作者通過這篇文章主要向我們描述了研究證明吃太多加工過的肉對(duì)我們有害．
解答 28．D．推理判斷題．根據(jù)第一段Eating hot dogs，ham and other processed meat can cause colorectal （直腸的） cancer，and eating red meat"probably"can also cause cancer可知這篇文章主要想告訴我們吃太多加工過的肉對(duì)我們有害；故選D．
29．A．細(xì)節(jié)理解題．根據(jù)文章Processed meat was defined as meat transformed through salting，curing，fermentation （發(fā)酵），smoking"or other processes to improve flavor or preservation可知肉是咸的，是腌的還是熏的是為了使肉的味道更好或保存更長；故選A．
30．C．細(xì)節(jié)理解題．根據(jù)倒數(shù)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可知根據(jù)數(shù)以百計(jì)的研究加工過的肉對(duì)身體有害；故選C．
31．B．推理判斷題．根據(jù)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認(rèn)為人們應(yīng)該控制對(duì)肉類的消費(fèi)；故選B．
點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．
