GRE5及答案解析.doc
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1、GRE5及答案解析(总分:26.98,做题时间:120 分钟)一、PART ONE (Time:30(总题数:7,分数:7.00)1.The monarch and his followers thought of the court as -|_|-how the kingdom ought to be, the harmonious expression of a larger social order centred on the monarch.(分数:1.00)A.a miscalculation ofB.irrelevant toC.a microcosm ofD.recogniz
2、able asE.isometric to2.These -|_|-over details are an indication of more serious battles to come, between those who want a strong centre at the heart of the Union and those who want to -|_|-the power ceded by national governments.(分数:1.00)A.sympathies . boostB.agreements . measureC.adjudications . c
3、onsolidateD.assumptions . inscribeE.skirmishes . limit3.An excellent philatelist can detect a forged -|_|-with a single glance, for a true specimen bears markings and characteristics, without exception, that the -|_|-invariably lacks.(分数:1.00)A.painting imitationB.insect approximationC.coin original
4、D.stamp facsimileE.treatise falsehood4.Because many of the blacklists in the communications and entertainment industries were secret, the number of playwrights, script writers, novelists, and journalists who were -|_|-to stop writing permanently is -|_|-.(分数:1.00)A.happy . astoundingB.forced . unkno
5、wnC.unafraid . impressiveD.inclined . unsurprisingE.remiss . inconceivable5.When he was ordered from above to expel two -|_|-comradesthey insisted on challenging the leadershiphe found himself caught between his official duties and his oldest -|_|-.(分数:1.00)A.dangerous . enmitiesB.obstreperous . loy
6、altiesC.peerless . inhibitionsD.dire . ambitionsE.excellent . considerations6.Having been -|_|-as immoral by some reviewers of Tess of the D Urbervilles four years earlier, Hardy subsequently -|_|-to preface his work with declamatory caveats.(分数:1.00)A.decried . optedB.established . failedC.answered
7、 . choseD.regarded . relinquishedE.ignored . desired7.Politicians, activists and parents owe it to their children to -|_|-educational opportunity, whether that means confronting school boards to -|_|-better-trained teachers, forming charter schools, or going to court to ensure equality of funding fo
8、r schools in poor areas.(分数:1.00)A.appraise . interestB.increase . replenishC.investigate . discoverD.question . impugnE.equalize . demand二、SECTION 2(总题数:1,分数:1.00)That large regions of the galaxy can be influenced by the formation of massive stars in a few localized regions requires that star forma
9、tion somehow be coordinated over long periods of time. The process commences with a single O-type star or a cluster of such stars in a giant molecular cloud, around which stellar radiation, winds and explosions carve a modest cavity from of the surrounding interstellar medium, concomitantly destroyi
10、ng the progenitor cloud. Perchance this disturbance triggers star formation in a nearby cloud, and so on, until the interstellar medium in this corner of the galaxy resembles Swiss cheese, composed of what theorists have recently begun to refer to as bubbles, or superbubbles, one of the most excitin
11、g discoveries in astrophysics in years. Within a hot bubble, the sun has revealed itself in x-rays emitted by highly ionized trace ions such as oxygen and at some point in the process of its formation, nearby bubbles commence to overlap, coalescing into a superbubble. The energy from more and more O
12、-type stars feeds this expanding superbubble until its natural buoyancy stretches it from the midplane up toward the halo, forming a chimneythe superbubble thus becomes a pathway for hot interior gas to spread into the upper reaches of the galactic atmosphere, producing a widespread corona. Far from
13、 its source of energy, the coronal gas slowly starts to cool and condense into clouds. Over eons, these clouds fall back to the galaxys mid-plane, completing the fountain-like cycle and replenishing the galactic disk with cool clouds from which star formation begins anew. Star formation often occurs
14、 in sporadic but intense bursts, but in the Milky Way the competing feedback effects almost balance out, so that stars form at an unhurried pacejust 10 per year on average, except in some galaxies where positive feedback has gained the upper hand. 20 million to 50 million years ago, star formation i
15、n the central parts of M82 began running out of control. Our galaxy, too, may have had sporadic bursts, and the way these starbursts occur, and what turns them off must be tied to the complex relation between stars and the tenuous atmosphere from which they precipitate. Progress will be made in this
16、 complicated subject as astronomers continue to study how the medium is cycled through stars, through the different phases of the medium, and between the disk and the halo. Observations of other galaxies give astronomers a birds-eye view of the interstellar goings-on, and answer such a critical ques
17、tion as whether stars are really the main source of power for the interstellar medium. The loop above the Cassiopeia superbubble1looks uncomfortably similar to the prominences that arch above the surface of the sun, prominences which owe much to the magnetic field in the solar atmosphere, and scient
18、ists have begun to wonder if magnetic activity dominates our galaxys atmosphere. (分数:0.98)(1).The primary function of the passage as a whole is to -|_|-.(分数:0.14)A.indicate the direction that research into a particular physical phenomenon should takeB.illustrate the limitations of applying mathemati
19、cs to complicated astrophysical phenomenaC.clarify the differences between an old explanation of a physical phenomenon and a new model of itD.introduce a new explanation of a physical phenomenonE.explain the difference between two related physical phenomena(2).Which of the following best describes t
20、he organization of the first paragraph?(分数:0.14)A.A theory is presented and criticized.B.A phenomenon is named and then explained.C.A model is described and evaluated for consistency.D.A result is reported and its importance explained.E.A hypothesis is introduced and contrary evidence presented.(3).
21、According to the passage, the more superbubbles that exist in a galaxy, -|_|-.(分数:0.14)A.the longer the star-formation process will take placeB.the greater the amount of interstellar gas in the galaxyC.the higher the positive feedback rate of star formation in the galaxyD.the less magnetic activity
22、in that galaxyE.the more regular the intervals of star formation(4).According to the passage, which of the following is true about the way stars usually form?(分数:0.14)A.They tend to overlap as they appear.B.They tend to result from the residual matter of supernovas.C.They tend to generate in sudden
23、irregular fits.D.They tend to destroy their progenitor clouds.E.They tend to form away from gas coronas.(5).According to the explanation given in the passage, which of the following causes superbubbles to gradually assume the shape of a chimney?(分数:0.14)A.The gravitational attraction of supernovas a
24、djacent to the region of the chimney s formationB.The effect of entropy on the relative abundance of hot interior gas within the superbubbleC.A chemical reaction involving ionized trace ions at the heart of the superbubbleD.A tendency toward coalescence in the gases that contribute to the formation
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- GRE5 答案 解析 DOC
