读图，完成以下问题。

语法填空。

    I'm Lucy．This is a map of our school．____six buildings(楼房)in it．They are a dining hall，an art building，a sports hall，a science building，a classroom building and a library．Our classroom building is ____the science building．And it's ____ the library．In the middle of our school,____a big playground(操场)．We often play sports on it．Next to the playground is the art building．It's____the dining hall and the sports hall．Our school is big，and it's nice．

孔子曾经编了一部记载当时鲁国历史的史书，名叫《春秋》，而这部史书中记载的时间跨度与东周的前期大体相当，所以后人就将东周的前期称为春秋时期，该时期始于（  ）

一杯酒精用掉一半，剩下一半的质量、比热容、热值  (    )