阅读短文，根据短文内容及首字母提示，在空白处填入一个适当的单词。

She is Liu Hui ,a middle school student in Anhui, one of the “ stay-at-home children” in her town. Liu Hui is 12 years old and lives 小题1: w _________ her sister. Her parents left home to make money in big cities when she was小题2:o ________ four. Liu Hui has to take 小题3: c _________ of her younger sister. They have to stay at home alone 小题4: b ________ they have to go to school.

“I used to feel小题5:s ________ without my parents at home,” she said, “but now I know 小题6: w _________ they do so. They have to go away to make money for小题7:u _________ so that we can live a better life.”

Every day, Liu Hui gets up at 6:30 a.m. and cooks小题8: b ______________. Then the two girls go to school. They have supper at 6:00 p.m. Then Liu Hui does housework and 小题9:h _____________ her sister with her homework. She usually goes to bed at 9:30 p.m.

Though busy, Liu Hui is still the 小题10:b ________ student in her class. She said, “My life is OK. But I still hope my parents will come back and live with us.” 

对白酒中铅含量的测定，一般使用（）法测定白酒中铅的含量。