The age of the Earth is about __________ years, and life has existed on the Earth for __________ years.

Question:The age of the Earth is about __________ years, and life has existed on the Earth for __________ years.

1.3.5 billion, 2.5 billion

2.3.5 billion, 1.5 billion

3.15 billion, 3.5 billion

4.4.5 billion, 3.5 billion


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