更多"Early forms of life on Earth, _____"的相关试题:
[单项选择]The text seems to imply that other forms of life in the cosmos ______.
A. have never existed
B. have all died out
C. may exist in the future
D. are in existence
[单项选择]Throughout his early adult life he passed from one religious system to another, unable to________ lasting spiritual satisfaction from any.
A. derive
B. detach
C. deduce
D. deprive
[单项选择]For three quarters of its span on Earth, life evolved almost ______ as microorganisms.
A. precisely
B. instantly
C. initially
D. exclusively
[单项选择]Things went well for her during her early life but in her middle age her________seemed to change.
A. affair
B. luck
C. event
D. chance
[单项选择]Things went well for him during his early life but in middle age his ______ seemed to change.
A. chance
B. luck
C. career
D. opportunity
[单项选择]The advanced life forms in nature are all symmetrical, instead of being ______ .
A. separated
B. disproportionate
C. mutable
D. imprecise
[单项选择]Scientists believe that when life on earth began, the earth atmosphere consisted of ___________.
A. oxygen and nitrogen
B. hydrogen, oxygen and nitrogen
C. hydrogen and its compounds
D. hydrogen, oxygen and their compounds
[单项选择]Students learning about how life began on Earth may be presented with the perplexing question, "Which came first, the chicken or the egg"
A. pressing
B. puzzling
C. patronizing
D. penetrating
[单项选择]The history of life on earth has been a history of between living things and their surroundings.
A. interaction
B. intersection
C. interference
D. intercourse
[单项选择]Life as we know exists on the earth because the atmosphere _________.
A. contains a layer of ozone gases.
B. about 42 degrees colder than on the ground.
C. 21% oxygen by weight.
D. less than 1% of xenon by volume
E. about 75 degrees colder than in Interlaken
F. is warmed by the earth’s heat.
[单项选择]All life on the earth ______ on the sun.
A. depends
B. carries
C. keeps
D. goes
[单项选择]Whether there is life beyond the earth is ______.
A. the only question that excites people
B. one of several questions which excite people
C. one of the most exciting questions
D. the question which most excites people
