某商场所卖的“蛋奶乳精”被怀疑为假冒伪劣婴儿奶粉，某生物研究性学习小组的同学想把调查该产品的合格情况作为研究性课题。假如你是课题组成员，请你尝试完成鉴定实验。

(1)举报人称“该蛋奶乳精不含奶，就是淀粉加香精混合而成”，鉴定是否含淀粉，具体操作方法是：_____________________________。

(2)鉴定该待测婴儿奶粉蛋白质的含量是否符合质量标准。

实验原理：________________________________________________。

材料用具：相同浓度的标准婴儿奶粉溶液和待测婴儿奶粉溶液、0.1g/mL的NaOH溶液、0.01g/mL的CuSO₄溶液、试管和滴管等。

实验步骤：

①．取两支试管分别加入2mL的标准婴儿奶粉溶液(编号甲)和2mL的待测婴儿奶粉溶液(编号乙)。标准婴儿奶粉溶液在本实验中起_________作用。

②．分别向两支试管中加入1mL的0.1g/mL的NaOH溶液，振荡，摇匀。

③．再分别向两支试管中加入3～4滴0.01g/mL的CuSO₄溶液，振荡，摇匀，比较颜色的变化。

④．预期可能的结果和结论：

__________________________________________；

__________________________________________。

根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。(每空一词)

Millions of words about young American people’s ideas, feelings and actions have been 小题1:w_▲_ over the years.

Today there are about seven million Americans in colleges and universities. Young people 小题2:u_▲_twenty-five are nearly half of American people.

Many of these will soon be in charge of (负责管理)the nation. Naturally their ideas are 小题3:i_▲_ to everyone in the country, and it is necessary for older people to understand what they 小题4:t _▲_ and feel.

College students today have strong opinions about 小题5:r_▲_ and wrong. They are deeply 小题6:i_▲_ in making a better life for all people, 小题7:e_▲_ for those who have not been given a fair chance before now. They see much that is wrong in the 小题8:l_▲_ of their parents. It is 小题9:h_▲_ for them to see what is right and good in the older ways. As a result, there is often 小题10:t_▲_ in American families.