分析下表我国各主要经济部门在国民生产总值中所占的比例变化，理解正确的是  

	农业	轻工业	重工业
在总产值 中的比例	1957年	43.3℅	31.2℅	25.5℅
1960年	21.8℅	26.1℅	52.1℅
增长率	-22.8℅	47℅	223℅

A．工农业生产相互促进，共同发展           B．我国已经建成了门类齐全的工业体系                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
C．我国已经实现了社会主义工业化           D．国民经济建设出现了严重的比例失调