题目

Height is just one of the thousands of features your genes decide. In fact, because you have two parents, your genes provide you a height that usually lands somewhere between the height of each parent. If both your parents are tall, then most probably you will be tall, too, but if you have questions about how tall you’re going to be, ask your doctor if he or she can help you find it out. But genes don’t decided everything. For example, eating an unhealthy diet can keep you from growing to your full potential(潜力). Getting plenty of sleep and enough exercise will help you grow to 有5瓶白色固体试剂，分别是Ba（NO3）2、KCl、NaOH、CuSO4和Na2SO4，现只提供蒸馏水，通过下面的实验步骤可鉴别它们．请填写下列空白．（1）各取少量固体试剂加入5支试管中，加入适量蒸馏水，振荡试管，观察到的现象是 ．被检出的物质的化学式是 ．（2）分别向剩下的4种溶液的试管中加入（1）中已检出的溶液，观察到的现象和相应的化学反应方程式是：①现象：试管中有白色沉淀生成，化学反应方程式： ．②现象：试管中有蓝色沉淀生成，化学反应方程式： ．有上述两个现象可知，被检验出的化学物质是 和 ．（3）最后可利用试剂 （填化学式）鉴别余下未检出的物质．