请教：绿皮书240， 267找不到讨论

mayli6

240. Though sucking zinc lozenges has been promoted as a treatment for the commom cold, research has revealed no consistent effect. Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds. Since the gel contains zinc in the same form and concerntration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concerntrate in the nose, not the mouth.  In order to eveluate the argument, it would be most helpful to determ which of the following?

A. Whether zinc is effective only against colds, or also has an effect on other virally caused diseases

B. Whether there are remedies that do not contain zinc but that, when taken orally, can reduce the duration of colds

C. Whether people who frequently catch colds have a zinc deficency

D. Whether either the zinc gel or the lozenges contain ingredients that hava an impact on the activity of the zinc

E. Whether the zinc gel has an effect on the severity of cold symptoms, as well as on their duration

答案是D,实在不懂activityof the zinc 和commom cold的关系

267. In Patton City, days are categorized as having heavy rainfall (more than two inches), moderate rainfall (more than one inch, but no more than two inches), light rainfall ( at least a trace, but no more than one inch), or no rainfall. In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.  If the statements above are true, then it is also possible that in Patton City

A. the number of days with heavy rainfall was lower in 1990 than in 1910

B. the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910

C. the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910

D. the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910

E. the average amount of rainfall per month was lower in 1990 than in 1910

答案是A,可是我觉得A应该是higher而不是lower.

天之角

240.activity of the zinc是治疗感冒的关键

D中说这两种药的其它成分会否对activity of the zinc产生影响。没有影响或正的影响就证明结论可靠，若果有负的影响，就证明结论是不成立的。

267题我解释不了，我也觉得应该是higher，请nn解答一下。

howardwang

以下是引用mayli6在2005-9-14 16:52:00的发言：

240. Though sucking zinc lozenges has been promoted as a treatment for the commom cold, research has revealed no consistent effect. Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds. Since the gel contains zinc in the same form and concerntration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concerntrate in the nose, not the mouth.  In order to eveluate the argument, it would be most helpful to determ which of the following?

A. Whether zinc is effective only against colds, or also has an effect on other virally caused diseases

B. Whether there are remedies that do not contain zinc but that, when taken orally, can reduce the duration of colds

C. Whether people who frequently catch colds have a zinc deficency

D. Whether either the zinc gel or the lozenges contain ingredients that hava an impact on the activity of the zinc

E. Whether the zinc gel has an effect on the severity of cold symptoms, as well as on their duration

答案是D,实在不懂activityof the zinc 和commom cold的关系

你将答案d取非和不取非各看一下对原文结论的作用，就该知道为什么d是对的了，应该很清楚的。

267. In Patton City, days are categorized as having heavy rainfall (more than two inches), moderate rainfall (more than one inch, but no more than two inches), light rainfall ( at least a trace, but no more than one inch), or no rainfall. In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.  If the statements above are true, then it is also possible that in Patton City

A. the number of days with heavy rainfall was lower in 1990 than in 1910

B. the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910

C. the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910

D. the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910

E. the average amount of rainfall per month was lower in 1990 than in 1910

答案是A,可是我觉得A应该是higher而不是lower.

注意题目要求it is also possible that in Patton City

在注意heavy rainfall (more than two inches都是heavy rainfall )，如果1天heavy rainfall 雨量1000 inches，是否大于10天每天3inches呢？

mayli6

感谢指引！原来是天数和雨量的区别。。。