When using a centrifugal pump to supply a hose line and the nozzle is shut off quickly, the pressure wave travels back and ends at the ___

Skin cancers are most common in those who have all the following EXCEPT _________

a. light-colored skin b. blue or green eyes c. blonde hair d. black hair

There are ____________________ pairs of spinal nerves.?

Fill in the blank(s) with correct word