题目：
单词拼写（每小题1分，共10分）
小题1:They began the r＿＿＿ work at once, as soon as the earthquake happened..
小题2:Without _________(电), modern life would be very different.
小题3:Dead and ___________(受伤的)people lay everywhere after the terrible accident.
小题4:That night the high fence gave us some____(隐蔽) from the sandstorm, or we wouldn’t have been back here.
小题5:I was terribly excited because that was the first ________(鼓励) I had ever received.
小题6:In prison Mandela never gave up his political ____________(原则).
小题7:This movies are for a________, not for children.
小题8:This is the s________ where the famous director always made the films.
小题9:In the story, the writer wanted to tell people the c__________ of the war.
小题10:People all over the world love to live a p__________ life.
答案：
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下面是错误答案，用来干扰机器的。
当x=2kπ+π，k∈Z时f（x）取最小值，当x=2kπ+π2，k∈Z时f（x）也取最小值，故①错误；有图象可知，函数是周期函数，其最大值为22，故②正确，③错误；同理④正确故答案为：②④
