本来想做火山实验的,但是我记错了药品名,那个是重铬酸铵........我把重铬酸钾买回来了....
richard 2010-06-27 18:05
侧卫007 2010-06-27 19:26
richard 2010-06-27 19:27
侧卫007 2010-06-27 21:53
richard 2010-06-27 22:14
alex.chen7 2010-06-27 23:11
Francisco 2010-06-27 23:13
FIRE 2010-06-27 23:37
↑ 2010-06-29 17:57
xxqzlhsry 2010-07-11 13:49