求教GWD-TN-4的两道逻辑题目。谢谢NN们解答

Five years ago, as part of a plan to encourage citizens of Levaska to increase the amount of money they put into savings, Levaska’s government introduced special savings accounts in which up to $3,000 a year can be saved with no tax due on the interest unless money is withdrawn before the account holder reaches the age of sixty-five.  Millions of dollars have accumulated in the special accounts, so the government’s plan is obviously working.

Which of the following, if true, most seriously weakens the argument?

A.      A substantial number of Levaskans have withdrawn at least some of the money they had invested in the special accounts.

B.      Workers in Levaska who already save money in long-term tax-free accounts that are offered through their workplace cannot take advantage of the special savings accounts introduced by the government.

C.      The rate at which interest earned on money deposited in regular savings accounts is taxed depends on the income bracket of the account holder.

D.      Many Levaskans who already had long-term savings have steadily been transferring those savings into the special accounts.

E.       Many of the economists who now claim that the government’s plan has been successful criticized it when it was introduced.

这道题目答案选择D。但是我认为是B。因为B中已经有tax free了。所以plan doesn't work。但是D中我认为是加强。

GWD6-Q32:

Proposal:  Carbon dioxide and methane in the atmosphere block the escape of heat into space.  So emission of these “greenhouse” gases contributes to global warming.  In order to reduce global warming, emission of greenhouse gases needs to be reduced.  Therefore, the methane now emitted from open landfills should instead be burned to produce electricity.

Objection:  The burning of methane generates carbon dioxide that is released into the atmosphere.

Which of the following, if true, most adequately counters the objection made to the proposal?

A.      Every time a human being or other mammal exhales, there is some carbon dioxide released into the air.

B.      The conversion of methane to electricity would occur at a considerable distance from the landfills.

C.      The methane that is used to generate electricity would generally be used as a substitute for a fuel that does not produce any greenhouse gases when burned.

D.      Methane in the atmosphere is more effective in blocking the escape of heat from the Earth than is carbon dioxide.

E.       The amount of methane emitted from the landfills could be reduced if the materials whose decomposition produces methane were not discarded, but recycled.

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GWD6-Q33:

Crowding on Mooreville’s subway frequently leads to delays, because it is difficult for passengers to exit from the trains.  Subway ridership is projected to increase by 20 percent over the next 10 years.  The Metroville Transit Authority plans to increase the number of daily train trips by only 5 percent over the same period.  Officials predict that this increase is sufficient to ensure that the incidence of delays due to crowding does not increase.

Which of the following, if true, provides the strongest grounds for the officials’ prediction?

A.      By changing maintenance schedules, the Transit Authority can achieve the 5 percent increase in train trips without purchasing any new subway cars.

B.      The Transit Authority also plans a 5 percent increase in the number of bus trips on routes that connect to subways.

C.      For most commuters who use the subway system, there is no practical alternative public transportation available.

D.      Most of the projected increase in ridership is expected to occur in off-peak hours when trains are now sparsely used.

E.       The 5 percent increase in the number of train trips can be achieved without an equal increase in Transit Authority operational costs.

第一道我给的答案是C，第二道是C。

请大家帮我分析一下为什么这两道题是这样子选的。谢谢

1. B eliminates the possiblity that the source of special saving account from the citizens are not from long-term saving, otherwise it will contradicts with the original purpose of the local government. They want to accumulate more saving money and it definitly won't help at all if people just transfer from previous saving account to another different account. Therefore, D demonstrates exactly what I just explained.

2.D is the answer, because D means the bad impact the Methane has on the warm of the earth is more harmful than carbon dioxide does. Thus, it'd better just let it be carbon dioxide emission than methane.

3. D is the answer. Initially it seems odd when you see the inproportional increase rate between 5% and 25%. Normally the more ridership is, the more subways will be provided. Actually not that many subways will be sponsored by the MTA. There is one possibility that the increased ridership is only for the off-peak hourse. Since there were more not-taken seats in the subway in off-peak hours, so if the ridership is increasing during that time, it will just fill in the left seats, which won't make much difference. In turns, it can explain that the reaon why they don't need much increase in the subways.