2018年湖北省孝感市中考理综(化学部分)试题(word版,含答案)
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(本题共10小题,每小题给出的A、B、C、D四个选项中只有一个正确答案。每小题2分,共20分)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2、下列实验操作正确的是3、下列说法不正确的是A.熟石灰常用于改良酸性士壤 B.炒菜时油锅着火,可用锅盖盖灭C.用灼烧的方法可区分羊毛纤维和棉纤维D....
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