Warning: file_put_contents(): Only 0 of 6856 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/oclz.com/index.php on line 55 alkali metal英英字典_alkali metal剑桥英语解释_alkali metal柯林斯英文解释_菜篮子兴趣思朗文词典
1. N any of the monovalent metals lithium, sodium, potassium, rubidium, caesium, and francium, belonging to group 1A of the periodic table. They are all very reactive and electropositive 碱金属