【基礎級練習題84】
1. a 之距離為何?<br/> (A) 68.8099 (B) 68.8909 (C) 68.8990<br/>2. b 狐之弧長為何?<br/> (A) 43.1699 (B) 43.1969 (C) 43.1996<br/> <p>【基础级练习题84】答案:<br/>1. a 之距离 = 68.8909,就是(B)<br/>2. b 弧之弧长 = 43.1969,就是(B)</p><p>动画解题演示已经发表,见:</p><p><a href="http://bbs.mjtd.com/forum.php?mod=viewthread&tid=55192&extra=&page=9&page">http://bbs.mjtd.com/forum.php?mod=viewthread&tid=55192&extra=&page=9&page</a>=</p>
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