明早要考试,在线急等答案

139. The following appeared as part of an article in a trade magazine.

“During a recent trial period in which government inspections at selected meat-processing plants were more frequent, the amount of bacteria in samples of processed chicken decreased by 50 percent on average from the previous year’s level. These results indicate that the trial schedule should be made permanent: by continuing with more frequent inspections, the government could thus cut in half the incidence of stomach and intestinal infections throughout the country. In the meantime, consumers of Excel Meats should be safe from infection because Excel’s main processing plant has shown more improvement in eliminating bacterial contamination than any other plant cited in the government report.”

找出了3个错误,大家帮我看看对不对

1,第一句,两件事只是先后发生,不一定有因果关系

2,即使有因果关系,在selected meat-processing plants 印证的道理也不一定能使用于throughout the country的plants

3,即使能使全国的amount of  baterial减少,也不说明 half the incidence of stomach and intestinal infections