More broadly, ammonium hydroxide (see ammonia) and soluble hydroxides of the alkaline earth metals are also called alkalies.
更广义的范围包括碱土金属。碱是强碱性的，会使红石蕊试纸变蓝色；
More broadly, ammonium hydroxide (see ammonia) and soluble hydroxides of the alkaline earth metals are also called alkalies.
更广义的范围包括碱土金属。碱是强碱性的，会使红石蕊试纸变蓝色；
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