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发布时间：2006-06-23 17:03     点击：

　　2. The author uses the phrase "orthodox view of the universe" (line 3) to refer to the belief that

　　(A) the space between the galaxies is devoid of matter

　　(B) the space between galaxies is occupied by stars that cannot be detected by optical photographs

　　(C) galaxies have decreased in mass by half since their formation

　　(D) galaxies contain stars, each the size of Jupiter, which form clusters

　　(E) galaxies are being penetrated by gas forced out of other galaxies by supernova explosions.

　　3. It can be inferred from the passage that, if Fabian is correct, gas in the peripheral regions of a galaxy cluster

　　(A) streams outward into intergalactic space

　　(B) is hotter than gas in the central regions of the galaxy

　　(C) is composed primarily of gas left over from the big bang

　　(D) results in the creation of unusually large stars

　　(E) expands to increase the size of the galaxy

　　4. The author of the passage probably mentions Canizares' determination in order to

　　(A) clarify an ambiguity in Fabian's research findings

　　(B) illustrate a generalization about the temperature of gas in a galaxy cluster

　　(C) introduce a new argument in support of the orthodox view of galaxies

　　(D) provide support for Fabian's assertions about the Perseus galaxies

　　(E) provide an alternate point of view concerning the movement of gas within a galaxy cluster

　　5. According to the passage, Fabian believes that gas flowing into a central galaxy has which of the following characteristics?

　　(A) It is one-tenth hotter than it was in the outer regions of the galaxy cluster.

　　(B) It emits radiation with wavelengths that change as the gas moves toward the center of the galaxy.

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