The Chinese Russian border or the Sino Russian border is the international border between China and Russia
Answer : scientists determine the absolute age of a rock in millions of years before present rather than just the age of the rock relative to the rock units around it. This information helps geologists develop more precise geological history models for the rocks and regions they study.
Explanation:
Strait is <span>A narrow channel connecting two bodies of water.</span>
The answer is C.15, USSR broke into 15 republics including Russia itself.