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中考化学基础知识100个问答题,开学预习必备!
中考化学是学生们面临的重要科目之一,掌握基础知识至关重要。本文为大家准备了100个常见的化学问答题,帮助同学们在开学前做好预习,打下坚实的基础! 返回搜狐,查看更多 电解水过程中,正极---气体?怎么验证的?现象?说明气体的性质? 氧气、带火星的木条、木条复燃、助燃性;负极---气体?怎么验证的?现象?说明气体的性质?氢气、点燃的火柴、气体被点燃,火焰呈淡蓝色、可燃性。
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