求解GWD24套内几道逻辑题，十万火急

yingxiong8

GWD-t6-14

Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives.However, since there are several wine makers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these wine makers without risking an allergic reaction to sulfites.

Which of the following is an assumption on which the argument depends?

A.These wine makers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
B.Not all forms of sulfite are equally likely to produce the allergic reactions.
C.Wine is the only beverage to which sulfites are commonly added.
D.Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.

E.Sulfites are not naturally present in the wines produced by these wine makers in amounts large enough to produce an allergic reaction in someone who drinks these wines.
实在想不通为什么选E

GWD-TN9-22
GWD-12-Q22:

Denoma, a major consumer-electronics maker, had a sizeable decline in sales revenue for its most recent fiscal year.This result appears surprising, because electronics retailers report that although their overall sales were considerably lower than in the previous year, their sales revenue from Denoma models actually grew, largely thanks to some innovative and popular models that Denoma introduced.
Which of the following, if true, does most to explain the apparently surprising result?

A.Because of the need to educate the public about its new moDels’ capabilities, Denoma
s advertising spending was higher than normal over the period.
B.For the period at issue, Denoma’s major competitors reported declines in revenue that were, in percentage terms, greater than Denoma’s.
C.A significant proportion of Denoma’s revenue comes from making components for other consumer-electronics manufacturers.

D.Unlike some of its major competitors, Denoma has no lines of business outside consumer electronicsprovide revenue when retail sales of consumer electronics are weak.

E.During the period, consumer-electronics retailers sold remaining units of Denomas superseded models at prices that were deeply discounted from those models’ original prices.

此外还有GWD-TN12-11,TN17-19,TN-19-38,TN-21-38 TN24-13

.

sdcar2010

14

The answer is E.  Since the question is about a necessary assumption, use the negation method.

If you negate E, you have:
sulfites ARE naturally present in the wines in large enough amount to cause allergic reaction.  
If this is true, those wine without added preservatives are also problematic because the NATURALLY occurring sulfites. Then the argument that allergic people can avoid sulfites by choosing wines without preservatives will not hold.

ellenchuwang

Yeah, that's it. There is another similar CR question that could be helpful to understand:

PREP CR2  83.    (25338-!-item-!-188;#058&001294)

Many people suffer an allergic reaction to sulfites, including those that are commonly added to wine as preservatives.  However, since there are several winemakers producing wine to which no sulfites are added, those who would like to drink wine but are allergic to sulfites can drink these wines without risking an allergic reaction to sulfites.
Which of the following, if true, most seriously weakens the argument?
A. Sulfites occur naturally in most wine.
B. The sulfites that can produce an allergic reaction are also commonly found in beverages other than wine.
C. Wines without added sulfites tend to be at least moderately expensive.
D. Apart from sulfites, there are other substances commonly present in wine that can trigger allergic reactions.
E. Wine without added sulfites sometimes becomes undrinkable even before the wine is sold to consumers.

The answer is A. Again, the word "naturally" is crutial.