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费密年龄理论 Fermi age theory
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The best title for this passage is ______.
A.The Age of Reason
B.The Need for Independent Thinking
C.The Value of Refutation
D.How People Think
At what age the hand preference is clearly marked?
A.Three years old.
B.Before the age of three.
C.Six and above.
D.From three to six years old.
How did scientists determine the age of the universe?
A.By observing the oldest stars in the universe.
B.By studying the nearest stars that can be seen.
C.By fixing the age of the oldest stars in the Galaxy.
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