“周幽王烽火戏诸侯”“孔子周游列国”的故事家喻户晓，你知道与“诸侯”“列国”的产生相关的制度是（     ）

    My name is Maggie.I am a 13-year-old Canadian girl. I live in Toronto. It's a very big city. I can speak English and French. I have classes from 8:00 a.m. to 2:40 p.m. I have lunch at school. Many girls love playing volleyball after school, but I like swimming. I have a big family, my father, my mother and two brothers. I think China is a great country. I want a Chinese pen pal.

    Please sendemails to me if you want to be my pen pal. My email address is maggie13@yahoo.com.

下列将声波转化为神经冲动的是（ ）