单词拼写：阅读下面短文，请根据所给中文正确拼写单词，使短文意思完整。每空限填一词。

    Imagine a life without arms or legs! You can't hold anything in your arms. You can't walk anywhere with you feet. How would you last a day like that? Would you____ (微笑) at yourself in the mirror like Nick Vujicic, the 29-year-old Australian?

    Nick was born without limbs(四肢)，so life was not____ (容易) for him. At school many students played ____ (笑话) on him because he looks different from everyone else. He was refused to be their friends, so he always felt ____ (孤独的). However, he faced that bravely. He____ (学习) to type and write with two toes(脚趾) at the age of six, and he could even surf and play golf. In college, he achieved great ____ (成功) and was among the most excellent students in the studies. And he decided on what to do later in his life—to encourage others to work hard for their ____ (梦想).

    Now Nick is one of the most ____ (受欢迎的) speakers in the world. He travels to many countries and gives speeches about his story____ (对抗)difficulties. “Living life fully is about looking at what you have, not what you don't have.” he said. His story encourages____ (百万) of people. “ I tell people to keep on getting up when they fall and to always love themselves,” he said. “If I can encourage just one person, then my job in this life is done.

地球自转一周的时间是(      )

计算：（ $\sqrt{2}$ +1）⁰﹣2^﹣1+ $\sqrt{27}$ ﹣6sin60°=____．

对下列各句中 “之”字的意义和用法，判断正确的一项是(　　)

①臣闻求木之长者　②源不深而望流之远　③人君当神器之重　④岂取之易守之难乎

北京有许多国际组织代表机构、100多个外国大使馆,以及众多的海外企业代表机构和外国新闻机构驻京记者站。这表明北京的城市职能之一是（    ）。