1.

THE_SLOW_DOWN_OF_EARTH‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_ROTATION_DUE_TO_THE_LOSS_OF_MECHANICAL_ENERGY_OF_EARTH_MOON_SYSTEM_IS_SINCE_________YEARS_FROM_EARTH‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_FORMATION.?$#

A. 1 billion
B. 2.5 billion
C. 3.5 billion
D. 4.5 billion
Answer» E.


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