请各位牛牛继续帮我解释一下我的错题！

guiyangshiyuan

The only purpose for which a particular type of tape is needed is to hold certain surgical wounds closed for ten days----the maximum time such wounds need tape. Newtape is a new brand of this type of tape. Newtape's salespeople claim that Newtape will improve healing because Newtape adhere twice as long as the currently used tape does.

Which of the following statements, if ture, would most seriously call into question the claim made by Newtape's salespeople?

A    Most surgical wounds take about ten days to heal

B    Most surgical tape is purchased by hospitals and clinics rather than by individual surgeons

C    The currently used tape's adhesiveness is more than sufficient to hold wounds closed for ten days

D    Neither Newtape nor the currently used tape adheres well to skin that has not been cleaned

E   Newtape's adhesion to skin that has been coated with a special chemical preparation is only half as good as the currently used tape's adhesion to such coated skin

为什么A不是正确的？？？

In the course of her researches, a historian recently found two documents mentioning the same person, Erich Schnitzler. One, dated May 3,1739, is a record of Schnitzler's arrest for peddling without a license. The second, undated, is a statment by Schnitzler asserting that he has been peddling off and on for 20 years.  The facts above best support which of the following conclusions?

A  Schnitzler started peddling around 1719.

B  schnitzler was arrested repeatedly for peddling

C   The undated document was written before 1765.

D   The arrested record was written after the undated document.

E    The arrest record provides better evidence thar Schnitzler peddled than does the undated document.

没读懂：（谢谢了！

kingsoft

       1. i think the answer is C

        the assumption of the salespeople's claim is that the longer a tape is, the more effective it is.

       if the currently used tape is long enough to cover the wounds, as C tells us, the new tape that is longer than the old one will have no effect on curing. thus C casts a serious doubt on the salespeople's claim

       if you add information indicated in choice A to the whole paragraph, you will find that the salespeople's claim is unaffected. thus A is inappropriate.( Most surgical wounds take about ten days to heal+the longer a tape is, the more effective it is)

[此贴子已经被作者于2004-9-13 0:18:26编辑过]

kingsoft

      off and on  断断续续地

     在一个历史学家的研究过程中，他发现了两个文献提到了同一个个人——ES。一个是1739年5月3日的文件，是ES这个人无证摆摊（卖东西）被逮捕的记录。第2个（文件）没有日期，是ES这个的话：他宣称自己断断续续摆摊有20年之久

     the right answer is C

    1739+20=1759<1765, 1739-20=1719<1765

guiyangshiyuan

大全GMAT format和FeiFei format指的是哪两本书？我参加的是今年7月的XDF的GMAT班，发的是一本《最新GMAT逻辑&数学教程》封面是绿色的，这本在CD有吗？谢谢！