三.计算题:
27.
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30.
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33. 
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(2)推算出OA
10的长;
(3)求出
的值.
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参考答案:
一.填空题
1.
,
,
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二.选择题
11.(
D); 12.(C); 13.(A); 14.(B); 15.(A); 16.(C); 17.(C) 18.(D);19.(C); 20.(C); 21.(D);22.(A); 23.(C); 24.(D); 25.(B); 26.(C);
三.计算
27.
; 28.
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