On a cosmic calendar,in which the history of the universe is compressed into one year,how long is the average human life span?
A)0.2 millisecond
B)0.2 second
C)2 seconds
D)2 minutes
E)2 hours

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The Answer of On a cosmic calendar,in which the history of the universe is compressed into one year,how long is the average human life span?
A)0.2 millisecond
B)0.2 second
C)2 seconds
D)2 minutes
E)2 hours

On a Cosmic Calendar,in Which the History of the Universe