大全逻辑揪心的~

cristina2

Which of the following best completes the passage below?

The unemployment rate in the United States fell from 7.5 percent in 1981 to 6.9 percent in 1986. It cannot, however, be properly concluded from these statistics that the number of unemployed in 1986 was lower than it had been in 1981 because______

(A) help-wanted advertisements increased between 1981 and 1986

(B) many of the high-paying industrial jobs available in 1981 were replaced by low-wage service jobs in 1986, resulting in displacements of hundreds of thousands of workers

(C) in some midwestern industrial states, the unemployment rate was much higher in 1986 than it had been in 1981

(D) the total available work force, including those with and without employment, increased between 1981 and 1986（D）

(E) the average time that employees stay in any one job dropped during the period 1981 to 1986

D,为嘛？

       Which of the following, if true, best completes the argument below?

Comparisons of the average standards of living of the citizens of two countries should reflect the citizens’ comparative access to goods and services. Reliable figures in a country’s own currency for the average income of its citizens are easily obtained. But it is difficult to get an accurate comparison of average standards of living from these figures, because______

(A) there are usually no figures comparing how much of two different currencies must be spent in order to purchase a given quantity of goods and services

(B) wage levels for the same job vary greatly from country to country, depending on cultural as well as on purely economic factors

(C) these figures must be calculated by dividing the gross national product of a country by the size of its population

(D) comparative access to goods and services is only one of several factors relevant in determining quality of life（A）

(E) the wealth, and hence the standard of living, of a country’s citizens is very closely related to their income

A,迷茫。

       Many plant varieties used in industrially developed nations to improve cultivated crops come from less developed nations. No compensation is paid on the grounds that the plants used are “the common heritage of humanity.” Such reasoning is, however, flawed. After all, no one suggests that coal, oil, and ores should be extracted without payment.

Which of the following best describes an aspect of the method used by the author in the argument above?

(B) The author applies to the case under discussion facts about phenomena assumed to be similar in some relevant respect.

(C) A position is strengthened by showing that the opposite of that position would have logically absurd consequences.

B, C怎么了？

It is widely assumed that a museum is helped financially when a generous patron donates a potential exhibit. In truth, however, donated objects require storage space, which is not free, and routine conservation, which is rather expensive. Therefore, such gifts exacerbate rather than lighten the demands made on a museum’s financial resources.

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

(A) To keep patrons well disposed, a museum will find it advisable to put at least some donated objects on exhibit rather than merely in storage.

(B) The people who are most likely to donate valuable objects to a museum are also the people who are most likely to make cash gifts to it.

(C) A museum cannot save money by resorting to cheap storage under less than adequate conditions, because so doing would drive up the cost of conservation.

(D) Patrons expect a museum to keep donated objects in its possession rather than to raise cash by selling them.（E）

(E) Objects donated by a patron to a museum are often of such importance that the museum would be obliged to add them to its collection through purchase if necessary.

E, 完全就没绕明白。