The popular movement cause of 1980's?

What property does soil or rock need to be permeable? a.)young b.)old c.)non porous d.)porosity

Technician a says the harmonic balancer may be attached to the crankshaft using a woodruff key and center bolt. technician b says the harmonic balancer may be attached to the crankshaft using a square key and center bolt. who is correct? choose one answer. a. technician a b. technician b c. both technician a and technician b d. neither technician a nor technician b

100 points! striked out answers are wrong