计算（﹣16）÷8的结果等于（　　）

      Every year people celebrate the Spring Festival in China．Usually it is in January or February．It's the most important (重要的) festival in China．So before it comes，everyone buys many things，and they often make a special kind of food called dumplings—It means(意思是) “come together”．Parents always buy new clothes for their children and children also buy presents for their parents．On the Spring Festival eve (除夕)，all the family come back home. They sing, dance and play cards．When they enjoy the meal，they give each other the best wishes for the coming new year．All of them have a good time.

①秦始皇建立郡县制

②汉武帝颁布“推恩令”

③唐代设立节度使

④宋太祖派文臣作知州

豌豆果皮绿色（D）对黄色（d）为显性，若将绿色豌豆（Dd）的花粉授到黄色豌豆（dd）的柱头上，则黄色豌豆上所结果实的颜色和种子中胚的基因组成分别是（　　）