1987年10月,邓小平在党的十三大上将“三步走”发展战略确定下来。其中,从1981年到1990年实现国民生产总值比1980年翻()番。
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An instance member()
A. is also called a static member
B. is always a variable
C. is never a method
D. belongs to a single instance, not to the class as a whole
E. always represents an operatio