湖北省孝感市2018年中考理综(化学部分)真题试题(含解析)
湖北省孝感市2018年中考理综(化学部分)真题试题可能用到的相对原子质量: H-1 C-12 N-14 O-16 Na-23 S-32 C1-35.5 K-39 Ca-40 Fe-56 Cu-64 Ag-108一、选择题1.精准扶贫是当前一项非常重要的工作。下列帮扶措施中主要发生化学变化的是A.建立销售网络B.腐熟农家肥C.架设电线D.清理池塘【答案】B【解析】化学变化是指变化时生成了其他物质的变化,物理变化是指没有生成其他物质的变化。A、建立销售网络,没有生成其他物质,属于物理变化;B、腐熟农家肥,生成了其他物质,属于化学变化。C、架设电线,没有生成其他物质,属于物理变...
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