Needs are
A.objective
B.subjective
C.None of these
D.both a and b
A.objective
B.subjective
C.None of these
D.both a and b
A.instruments
B.men
C.both of these
A.new knowledge is put to new uses.
B.Old knowledge is put to new uses.
C.when change happens.
A.149 inventions and discoveries.
B.148 inventions and discoveries.
C.147 inventions and discoveries.
A.rejecting them
B.accepting them
C.destroy them
D. non of these