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费费逻辑中的问题,求助

Canadians now increasingly engage in "out-shopping," which is shopping across the national border, where prices are lower. Prices are lower outside of Canada in large part because the goods-and-services tax that pays for Canadian social services is not applied.Which one of the following is best supported on the basis of the information above?
(A)If the upward trend in out-shopping continues at a significant level and the amounts paid by the government for Canadian social services are maintained, the Canadian goods-and-services tax will be assessed at a higher rate.
(B)If Canada imposes a substantial tariff on the goods bought across the border, a reciprocal tariff on cross-border shopping in the other direction will be imposed, thereby harming Canadian businesses.
(C)The amounts the Canadian government pays out to those who provide social services to Canadians are increasing.
(D)The same brands of goods are available to Canadian shoppers across the border as are available in Canada.
(E)Out-shopping purchases are subject to Canadian taxes when the purchaser crosses the border to bring them into Canada.


6. Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.The conclusion of the argument above depends on which of the following assumptions?
(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.
(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.
(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.
(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.
(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.


8.Blood banks will shortly start to screen all donors for NANB hepatitis.Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.The argument above depends on which of the following assumptions?
(A)Donors carrying NANB hepatitis do not,in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.
(B) Donors carrying NANB hepatitis do not,in a large percentage of cases, develop the disease themselves at any point.
(C) The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
(D) The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
(E) The donors who will still supply NANB-contaminated blood will donate blood at the average frequency for all donors.


0.The program to control the entry of illegal drugs into the country was a failure in 1987. If the program had been successful, the wholesale price of most illegal drugs would not have dropped substantially in 1987.The argument in the passage depends on which of the following assumptions?
(A) The supply of illegal drugs dropped substantially in 1987.
(B) The price paid for most illegal drugs by the average consumer did not drop substantially in 1987.
(C) Domestic production of illegal drugs increased at a higher rate than did the entry of such drugs into the country.
(D) The wholesale price of a few illegal drugs increased substantially in 1987.
(E) A drop in demand for most illegal drugs in 1987 was not the sole cause of the drop in their wholesale price.

.Most geologists believe oil results from chemical transformations of hydrocarbons derived from organisms buried under ancient seas. Suppose,instead, that oil actually results from bacterial action on other complex hydrocarbons that are trapped within the Earth. As is well known, the volume of these hydrocarbons exceeds that of buried organisms. Therefore, our oil reserves would be greater than most geologists believe.Which of the following, if true, gives the strongest support to the argument above about our oil reserves?
(A) Most geologists think optimistically about the Earth's reserves of oil.
(B) Most geologists have performed accurate chemical analyses on previously discovered oil reserves.
(C) Ancient seas are buried within the Earth at many places where fossils are abundant.
(D) The only bacteria yet found in oil reserves could have leaked down drill holes from surface contaminants.
(E) Chemical transformations reduce the volume of buried hydrocarbons derived from organisms by roughly the same proportion as bacterial action reduces the volume of other complex hydrocarbons.


请帮忙解释一下,谢谢
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JENNY:We share the same 头像。最后一题建议你这样看:
第一名话讲的是一个背景知识,大可不必在意。第二名讲是ARGUMENT 的premise,最后比例大是结论。从前提到结论之间差一个什么呢?E也

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LICHENG:供参考
第8题的关键词是prospective and actual donors.如果硬要考虑A选项的话,您就考虑一下ACTUAL 的提法,就认为他讨论的HEPATITIS donors 实际上是actual donors,已经经过您考虑的other infections的筛选了。

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第一题的E肯定不会是正确答案,因为题目中已明确讲到税的问题,就不要再推测其余税种等问题了

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简单地说,最后一题完全是在考英语阅读:)
没什么特别要指出的,
只有E是相关选象,其他都是在胡扯

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可不可以解释一下最后一题?[em08][em08]

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hi,
大家发言很热烈啊,很抱歉我来晚了,让大家很着急

我来说一下8的看法。
8.Blood banks will shortly start to screen all donors for NANB hepatitis.Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.The argument above depends on which of the following assumptions?
(A)Donors carrying NANB hepatitis do not,in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.
(B) Donors carrying NANB hepatitis do not,in a large percentage of cases, develop the disease themselves at any point.
(C) The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
(D) The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
(E) The donors who will still supply NANB-contaminated blood will donate blood at the average frequency for all donors.

判断是不是ASSUMPTION的好办法是把选择否定,
然后放进原文,看是不是
1)阻碍了结论的道出
2)而且和原文中的条件一致,搭配紧密

先看E,否定了以后变成:
The donors who will still supply NANB-contaminated blood will NOT donate blood at the average frequency for all donors.
符合了1),
但是好象2)中的“和原文条件搭配紧密”没有做到。
先放一放

再看A)
否定以后成为:
A)Donors carrying NANB hepatitis DO,in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed。

显然1)是可以的,这个理由很明显啊,如果一个人有很多病。。。那么一开始就被拒绝献血了。
再看2)显然比E)要来的强,因为这里都是在说TESTS,什么病。。。

我一开始也选了E,但是看了一下A觉得A比E好,
另外在其他地方我也遇到相似题目:

某学校研究生招生,决定对每个申请人的还贷款进行检查,发现有人不还钱的,就不收,但是这样还是有漏网只鱼。问ASSUMPTION,
就有一个选象是:
这些申请人没有其他会被距收的理由。

该题目来自PR

谢谢大家

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由于这题我的选项与他们的“正确答案”不一致,所以我也等着呢。现在,你先别急,若该帖一有明确回复,我立即用“短消息”通知你来讨论。
Robert之家-----我的家园

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怎么没人回呀? 这是个很重要的问题呀!如何判断assuption.

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能解释一下为什么E 不对吗?

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