更多"For three quarters of its span on E"的相关试题:
[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]Light goes three quarters of the way from the earth to the noon in one second．
A. 光一秒钟以后能走完25%的路程、从地球到月球。
B. 光一秒钟可以走过地球至月球距离的75%。
C. 光一秒钟可以走过地球至月球距离的四分之三。
D. 光一秒钟可以通过地球到月球距离的四分之三。
[单项选择]Nearly (three quarters) of the surface of the earth (are) covered with water, and there (would be) even less land (if) the polar icecaps were melted.
A. three quarters
B. are
C. would be
D. if
[单项选择]In Earth's infancy, its surface was warm enough for life ____ the young Sun was fainter than it is today.
A. ( in spite of
B. ( whether
C. ( neither of which
D. ( even though
[单项选择]The sentence "our life span outpaces our usefulness" means we can live longer ______.
A. and make progress
B. and do more work
C. but move slowly
D. but become useless
[单项选择]Despite the fact that the life span of animals is conveniently divided into separate stages, including the prenatal, adolescent, and senescent, these periods are not truly______.
A. (A) co-dependent
B. (B) reflexive
C. (C) distinct
D. (D) coterminous
E. (E) continuous
[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.
