更多"Whether there is life beyond the ea"的相关试题:
[单项选择]She sat there brooding______ whether such a life is worth living.
A. for
B. above
C. over
D. under
[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]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]All life on the earth ______ off the sun.
A. depends
B. carries
C. keeps
D. goes
[单项选择]Early forms of life on Earth, ______ in absence of oxygen, required other elements.
A. which lived
B. that lived
C. lived
D. were living
[单项选择]Without water, there ______ no life on the earth.
A. would be
B. be
C. is
D. was
[单项选择]Safety officials have earnestly questioned whether the increased use of synthetic materials heightens the risk of fire.（ ）
A. cautiously
B. severely
C. accurately
D. seriously
[单项选择]How does everything living on earth live
A. Each plant can live alone.
B. Each animal can live alone.
C. Everything living on earth cannot live without needing other living things.
D. If living things want to live they must kill each other.
[单项选择]Personal computers are no longer something beyond the ordinary people. They are _______ available these days.
A. glowingly
B. instantly
C. readily
D. quickly
[单项选择]Country life differs from city life in that a sense of community generally ______ the inhabitants of small villages together.
A. combines
B. links
C. binds
D. ties
[单项选择]Without the greenhouse gases, the earth would
A. become warmer.
B. be much colder.
C. move more slowly.
D. move quickly.
