理工类单选集考试卷模拟考_试题

1、姓名：_ 班级：_ 学号：_-密-封 -线- 理工类单选集考试卷模拟考_试题考试时间：120分钟 考试总分：100分题号一二三四五总分分数遵守考场纪律，维护知识尊严，杜绝违纪行为，确保考试结果公正。1、*html*”life form found” on saturns titan? ?scientists say they have discovered hints of alien life on the saturns moon. the discovery of a sort of life was announced after researchers at the us space

2、 agency, nasa, analyzed data from spacecraft cassini, which pointed to the existence of methane-based form of life on saturns biggest moon.? ?scientists have reportedly discovered clues showing primitive alien beings are “breathing” in titans dense atmosphere filled with hydrogen.? ?they argue that

3、hydrogen gets absorbed before hitting titans planet-like surface covered with methane lakes and rivers. this, they say, points to the existence of some “bugs” consuming the hydrogen at the surface of the moon less than half the size of the earth.? ?”we suggested hydrogen consumption because its the

4、obvious gas for life to consume on titan, similar to the way we consume oxygen on earth,” says nasa scientist chris mckay. “if these signs do turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water-based life on earth. “? ?to

5、 date, scientists have not yet detected this form of life anywhere, though there are liq-uid-water-based microorganisms on earth that grow well on methane or produce it as a waste product. on titan, where temperatures are around 90 kelvin (minus 290 degrees farenheit), a methane-based organism would

6、 have to use a substance that is liquid as its medium for living processes, but not water itself. water is frozen solid on titans surface and much too cold to support life as we know it.? ?scientists had expected the suns interactions with chemicals in the atmosphere to produce a coating of acetylen

7、e on titans surface. but cassini detected no acetylene on the surface.? ?the absence of detectable acetylene on the titans surface can very well have a non-bio-logical explanation, said mark allen, a principal investigator of the nasa titan team.? ?”scientific conservatism suggests that a biological

8、 explanation should be the last choice after all non-biological explanations are addressed,” alien said. “we have a lot of work to do to rule out possible non-biological explanations. it is more likely that a chemical process, without biology, can explain these results. /what have scientists found a

9、bout saturn? （ ）a.they have found methane-based life on saturn.b.they have found a new moon orbiting saturn.c.they have found methane-based life on titan.d.they have found earthlike life on a saturns moon.2、*html*”life form found” on saturns titan? ?scientists say they have discovered hints of alien

10、 life on the saturns moon. the discovery of a sort of life was announced after researchers at the us space agency, nasa, analyzed data from spacecraft cassini, which pointed to the existence of methane-based form of life on saturns biggest moon.? ?scientists have reportedly discovered clues showing

11、primitive alien beings are “breathing” in titans dense atmosphere filled with hydrogen.? ?they argue that hydrogen gets absorbed before hitting titans planet-like surface covered with methane lakes and rivers. this, they say, points to the existence of some “bugs” consuming the hydrogen at the surfa

12、ce of the moon less than half the size of the earth.? ?”we suggested hydrogen consumption because its the obvious gas for life to consume on titan, similar to the way we consume oxygen on earth,” says nasa scientist chris mckay. “if these signs do turn out to be a sign of life, it would be doubly ex

13、citing because it would represent a second form of life independent from water-based life on earth. “? ?to date, scientists have not yet detected this form of life anywhere, though there are liq-uid-water-based microorganisms on earth that grow well on methane or produce it as a waste product. on ti

14、tan, where temperatures are around 90 kelvin (minus 290 degrees farenheit), a methane-based organism would have to use a substance that is liquid as its medium for living processes, but not water itself. water is frozen solid on titans surface and much too cold to support life as we know it.? ?scien

15、tists had expected the suns interactions with chemicals in the atmosphere to produce a coating of acetylene on titans surface. but cassini detected no acetylene on the surface.? ?the absence of detectable acetylene on the titans surface can very well have a non-bio-logical explanation, said mark all

16、en, a principal investigator of the nasa titan team.? ?”scientific conservatism suggests that a biological explanation should be the last choice after all non-biological explanations are addressed,” alien said. “we have a lot of work to do to rule out possible non-biological explanations. it is more

17、 likely that a chemical process, without biology, can explain these results. /what do scientists say about titan? （ ）a.water on titan exists in the form of ice.b.there are life clues there.c.rivers and lakes there contain life forms.d.there is acetylene ther3、*html*”life form found” on saturns titan

18、? ?scientists say they have discovered hints of alien life on the saturns moon. the discovery of a sort of life was announced after researchers at the us space agency, nasa, analyzed data from spacecraft cassini, which pointed to the existence of methane-based form of life on saturns biggest moon.?

19、?scientists have reportedly discovered clues showing primitive alien beings are “breathing” in titans dense atmosphere filled with hydrogen.? ?they argue that hydrogen gets absorbed before hitting titans planet-like surface covered with methane lakes and rivers. this, they say, points to the existen

20、ce of some “bugs” consuming the hydrogen at the surface of the moon less than half the size of the earth.? ?”we suggested hydrogen consumption because its the obvious gas for life to consume on titan, similar to the way we consume oxygen on earth,” says nasa scientist chris mckay. “if these signs do

21、 turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water-based life on earth. “? ?to date, scientists have not yet detected this form of life anywhere, though there are liq-uid-water-based microorganisms on earth that grow we

22、ll on methane or produce it as a waste product. on titan, where temperatures are around 90 kelvin (minus 290 degrees farenheit), a methane-based organism would have to use a substance that is liquid as its medium for living processes, but not water itself. water is frozen solid on titans surface and

23、 much too cold to support life as we know it.? ?scientists had expected the suns interactions with chemicals in the atmosphere to produce a coating of acetylene on titans surface. but cassini detected no acetylene on the surface.? ?the absence of detectable acetylene on the titans surface can very w

24、ell have a non-bio-logical explanation, said mark allen, a principal investigator of the nasa titan team.? ?”scientific conservatism suggests that a biological explanation should be the last choice after all non-biological explanations are addressed,” alien said. “we have a lot of work to do to rule

25、 out possible non-biological explanations. it is more likely that a chemical process, without biology, can explain these results. /to date, scientists have not yet detected this form of life. (paragraph 5) what does “this form of life” refer to? （ ）a.gas-based life.b.methane-based life.c.water-based

26、 life.d.liquid-water-based microorganisms.4、*html*”life form found” on saturns titan? ?scientists say they have discovered hints of alien life on the saturns moon. the discovery of a sort of life was announced after researchers at the us space agency, nasa, analyzed data from spacecraft cassini, whi

27、ch pointed to the existence of methane-based form of life on saturns biggest moon.? ?scientists have reportedly discovered clues showing primitive alien beings are “breathing” in titans dense atmosphere filled with hydrogen.? ?they argue that hydrogen gets absorbed before hitting titans planet-like

28、surface covered with methane lakes and rivers. this, they say, points to the existence of some “bugs” consuming the hydrogen at the surface of the moon less than half the size of the earth.? ?”we suggested hydrogen consumption because its the obvious gas for life to consume on titan, similar to the

29、way we consume oxygen on earth,” says nasa scientist chris mckay. “if these signs do turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water-based life on earth. “? ?to date, scientists have not yet detected this form of life

30、 anywhere, though there are liq-uid-water-based microorganisms on earth that grow well on methane or produce it as a waste product. on titan, where temperatures are around 90 kelvin (minus 290 degrees farenheit), a methane-based organism would have to use a substance that is liquid as its medium for

31、 living processes, but not water itself. water is frozen solid on titans surface and much too cold to support life as we know it.? ?scientists had expected the suns interactions with chemicals in the atmosphere to produce a coating of acetylene on titans surface. but cassini detected no acetylene on

32、 the surface.? ?the absence of detectable acetylene on the titans surface can very well have a non-bio-logical explanation, said mark allen, a principal investigator of the nasa titan team.? ?”scientific conservatism suggests that a biological explanation should be the last choice after all non-biol

33、ogical explanations are addressed,” alien said. “we have a lot of work to do to rule out possible non-biological explanations. it is more likely that a chemical process, without biology, can explain these results. /what can be inferred from what allen said? （ ）a.scientists have different arguments o

34、ver whether there is life on titan.b.scientists all agree that a non-biological chemical reaction is a possible explanation.c.scientists all suggest that a biological explanation is reasonable.d.scientists all agree that there is life on titan.5、*html*”life form found” on saturns titan? ?scientists

35、say they have discovered hints of alien life on the saturns moon. the discovery of a sort of life was announced after researchers at the us space agency, nasa, analyzed data from spacecraft cassini, which pointed to the existence of methane-based form of life on saturns biggest moon.? ?scientists ha

36、ve reportedly discovered clues showing primitive alien beings are “breathing” in titans dense atmosphere filled with hydrogen.? ?they argue that hydrogen gets absorbed before hitting titans planet-like surface covered with methane lakes and rivers. this, they say, points to the existence of some “bu

37、gs” consuming the hydrogen at the surface of the moon less than half the size of the earth.? ?”we suggested hydrogen consumption because its the obvious gas for life to consume on titan, similar to the way we consume oxygen on earth,” says nasa scientist chris mckay. “if these signs do turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water-based life on earth. “? ?to date, scientists have not yet detected this form of life anywhere, though there are liq-uid-water-based microorganisms on earth that g