77. What is the net number of octahedral holes contained in the close packing of spheres unit cell like
face-center cubic?
(A) 8
(B) 4
(C) 12
(D) 6
(E) 3
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統計: A(1), B(27), C(0), D(1), E(0) #3101828
統計: A(1), B(27), C(0), D(1), E(0) #3101828