Do you have the ability to live cheaply? Now here's a true story of an American girl，Sarah．1Sarah left university，she began to live in New York City on her own．She 2 a job in a publishing house，but the salary(薪水)was 3 $30，000 a year．Her parents thought her life would be hard，but Sarah 4live on her salary and still saved $5，000 in a year．How was that 5 in one of the most expensive cities in the world?
   Cheap living 6starts with keeping the big cost small．For most people，that 7housing．So Sarah chose to share a flat with three other friends．Her next biggest cost was  8．When she ate out，she went to cheap restaurants．9 she bought a $9．99 whole chicken at a local restaurant．She then10the chicken bones(骨头)home and made soup out of them．Nowadays young people often 11 a lot of money on entertainment(娱乐)．But Sarah said，"I enjoy walking 12 in New York City．I love going to museums and parks．" Did Sarah feel poor13 cheap living? Not really．She even managed to take two trips，one to the Netherlands，14to Portland．
   “Don't think of saving money as something15．It's a kind of game，"said Sarah． 

1774年，日本著名医者杉田玄白翻译了荷兰人J．Kulmus所著的《解体新书》。这是日本第一部译自外文的人体解剖学书籍，“解体”也是中国医学名词的鼻祖。以《解体新书》的出版为契机，在江户时代日本的学术文化中心，形成了一个后来成为兰学（即通过荷兰传播到日本的西方学术）核心的群体。这说明（    ）

某学区化学竞赛题目之一是“配制70g20%的氯化钠溶液”。该实验的部分操作如下图所示。