The difference between the meanings of combining forms spondyl/o and vertebr/o is spondyl/o and vertebr/o both mean vertebra. There is no difference because they are both vertebra.
Spondyl/o is a combining form meaning vertebrae. The two combining forms for vertebrae bones of the spine, are vertebr/o and spondyl/o.
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If your asking where Most people in cities get there water.
Then the answer is by delivery through pipes.
<h2>The answer to 9 is <em><u>slippage of a block of material moving along a curved surface</u></em></h2>