解推断题的关键是找出“题眼”.然后根据题干给出的条件和框图所给的转化关系,结合所学的知识,顺藤摸瓜,逐步推断,使题目得解.下面是几道在2011年中考中出现的推断题,以此为例与大家共同探讨.例1(河北)A～G表示初中化学常见的物质.它们之间的转化关系如图所示:A为金属氧化物,E、F为金属单质,且F为紫 The key to solve the inference problem is to find out the problem. Then according to the conditions given by the title and the conversion relations given by the block diagram, combined with the knowledge learned, follow the example, gradually inference, so that the problem is solved. Road in the 2011 senior high school entrance examination inferred problems, as an example to discuss with you.Example 1 (Hebei) A ~ G said junior high school chemistry common material.The conversion between them as shown: A is the metal oxide Objects, E, F are metal elements, and F is violet