搜索 - 科创

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不稳定并不意味这不存在啊碳正离子也不是很稳定，你不能说碳正离子不存在，对不对？[s:269]其实LZ所讨论的问题都已经涉及到水的自偶电离了，那么这种微弱的电离也不能被忽略弱碱性环境下，Fe3+的浓度是...

所以就想是不是可以适当提高温度，一些反应温度在一百度左右的也许可以直接用焦磷酸吸水。但醇类的硝化已经不能用磷酸脱水了我觉得，三十五度二氧化氮就已经非常多了，也许可以直接放五氧化二磷吸收体系水分但并没有...

不是因为是一条直线，而是因为颜色是红的。如果是蓝色激光，那么那帮家伙又会举着一把激光笔说：紫外线笔甩卖咯！两毛一斤咯！这个方法还可以测量远处对象的高度等等……如果你比较穷，也可以用两面小镜子玩。效果也...

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