题目

单词拼写(共10小题;每小题1分,满分10分) 根据下列句子及所给汉语注释,在句子右边的横线上写出空缺处各单词的正确形式。 (每空只写一词) 66.The researchers and scientists in Zhongguaancun know that they can only reach the top if they are ready to deal with and learn from _________(失败). 67.Bankruptcy(破产) is one of the common __________(现象) in an economic recession(衰退). 68.There are a lot of blocks of ice _________ (漂浮) on the surface of the lake. 69.I will go __________(商业区) to do some shopping this weekend. 如图,AC是⊙O直径,△ABC内接于⊙O,E是BC边上一个动点(与B、C不重合),连结AE,并延长交⊙O于点D,连结CD.已知⊙O的半径为1,∠BAC=60°.(1)当E为BC的中点时,求的值;(2)设CE为x,求的值(用含x的代数式表示);(3)能否找到一个点E,使得=8-2?如果能,求出点E的位置;如果不能,请说明理由.
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