The most important advantage of northeast china that mainly contributed toward its being the industrial and technological center of the country in the 1970s and 1980s is:

The  most important advantage  of  northeast china  that  mainly contributed toward its being  the  industrialand  technological center  of the  country  in the  1970s  and  1980s  is:   its  juxtaposition with china's  most important industrial  neighbors.

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