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For a vehicle to qualify as a fire engine it must have a water pump and a hose.
a bicycle
One of two things that a political region must have is voters. The other thing that they must have is political parties.
motercycle
two things that have to be cited are the Arthur's names and were you got t from
two things that have to be cited are the Arthur's names and were you got t from
a number and a unit
an answer and an equation .
they must be correct and they must be the right kind of sample
they must be correct and they must be the right kind of sample
Its units and something...
The two things are momentum and acceleration when the effort force is applied to a machine