02年职称英语考试综合类(B级)试题及答案5

1、02 年职称英语考试综合类 B 级 试题及答案 5第二篇 Life in the UniverseMany scientists today are convinced that 1ire exists elsewhere in the universe-life probably much like that on our own planet They reason in the following wayAs far as astro no mers天文学家ca n determ ine, the en tire uni verse is built of the same matter

2、They have no reason to doubt that matter obeys the same laws in every part of the universe；Therefore， it is reasonable to guess that other star，swith their own planets， were bom in， the salne way as our own solar systemWhat we know of lire on earth suggests that life will arise wherever the proper c

3、onditions existLife requires the right amount and kind of atmosphere This eliminates all those planets ill the universe that are not about the same size and weight as the earthA smaller planet would lose its atmosphere；a larger one would hold too much of itLife also requires a steady supply of heat

4、and lightThis eliminates double starsor stars that flare up闪耀suddenly. Only single stars that are steady sources of heat and light like our sun would qualify Finally,life could evolve only if the planet is iust the right distance from its sun. With a weaker sun than our own， the planet would have to

5、 be closer to it. With a stronger sun， it would have to be farther away.If we suppose that every star in the universe has a family of planets， then how many planets might support life?First， eliminate those stars that are not 1ike our sun. Next， eliminate most of their planets；they are either too fa

6、r from or too close to their suns. Ttmn eliminate all those planets which are not the same size and weight as the earth. Finally,remember that the proper conditions do not necessarily mean that life actually does exist on a planet. It may not have begun yet， or it may have already diedoutThis proces

7、s of elimination seems to leave very few planets on which earthlike life might be found However,even if life could exist on only one planet in a million there are so many billions of planets that this would stillIeave a vast number on which life could exist 36 Astronomers belmve that matter in diffe

8、rent parts of the universeA obeys different laws B obeys one common lawC obeys the same lawsD obeys no common law 37 The passagementions all of the following factors for the existence of life EXCEPTA the fight amount of atmosphere B a steady supply of waterC steady heat and lightD the fight distance

9、 from the sun 38 Which of the following statements is INCORRECT?A Astronomers believe that the universe is built of the same matterB Proper conditions are essential to the existence of lifeC Double stars can provide steady light and heatD Astronomers believe that other solar systems are similar in s

10、tructure to ours39 What kind of planet elsewhere in the universe can support life?A Those double stars'planetsB Those planets much hotter than our earthC Those planets similar to the earthD Those planets very close to their suns40 At the end of the passage the author suggests that A it is impossible for life to exist on other