请教！gmat_63篇, P2_5, P3_3， P4_7, P5_9, P8_3, and P9_4,6

P2/63:    5.     It can be inferred from the passage that the author most probably thinks that giving the disenfranchised “a piece of the action” (line 38) is

(A) a compassionate, if misdirected, legislative measure

(B) an example of Americans’ resistance to profound social change

(C) an innovative program for genuine social reform

(D) a monument to the efforts of industrial reformers（B）

(E) a surprisingly “Old World” remedy for social ills

为什么选B, 而不选C?

P3/63:  3.     The author refers to a “conveyor belt” in line 13 in order to

(A) illustrate the effects of convection in the mantle

(B) show how temperature differences depend on the positions of the continents

(C) demonstrate the linear nature of the Mid-Atlantic Ridge

(D) describe the complicated motions made possible by back-coupling（A）

(E) account for the rising currents under certain mid-ocean ridges

我选了B, 问什么选A

P4/63：7.     It can be inferred from the passage that some scientists believe that pterosaurs

(A) lived near large bodies of water

(B) had sharp teeth for tearing food

(C) were attacked and eaten by larger reptiles

(D) had longer tails than many birds（A）

(E) consumed twice their weight daily to maintain their body temperature

9.     Which of the following, if true, is the best criticism of the author’s argument concerning why poverty statistics cannot properly be used to show the effects of problems in the labor market?

(A) A short-term increase in the number of those in poverty can indicate a shortage of jobs because the basic number of those unable to accept employment remains approximately constant.

(B) For those who are in poverty as a result of joblessness, there are social programs available that provide a minimum standard of living.

(C) Poverty statistics do not consistently agree with earnings statistics, when each is taken as a measure of hardship resulting from unemployment.

(D) The elderly and handicapped categories include many who previously were employed in the labor market.（A）

(E) Since the labor market is global in nature, poor workers in one country are competing with poor workers in another with respect to the level of wages and the existence of jobs.

这道我也是猜得，不知道应该怀原到哪？

3.     In the last paragraph, the author describes the development of astronomy in order to

(A) suggest that the potential findings of neutrino astronomy can be seen as part of a series of astronomical successes

(B) illustrate the role of surprise in scientific discovery

(C) demonstrate the effectiveness of the DUMAND apparatus in detecting neutrinos

(D) name some cosmic phenomena that neutrino astronomy will illuminate（A）

(E) contrast the motivation of earlier astronomers with that of the astrophysicists working on the DUMAND project

我觉得B也好像是对的，它错在哪儿？

P9/63

4.     It can be inferred from the author’s argument that a price fixed by the seller “seems pernicious” (line 7) because

(A) people do not have confidence in large firms

(B) people do not expect the government to regulate prices

(C) most economists believe that consumers as a group should determine prices

(D) most economists associate fixed prices with communist and socialist economies（C）

(E) most economists believe that no one group should determine prices

为什么选c?

6.     According to the author, price-fixing in non-socialist countries is often

(A) accidental but productive

(B) illegal but useful

(C) legal and innovative

(D) traditional and rigid（E）

(E) intentional and widespread

我选了d, 为什么不对？