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球扇形

球扇形 做朗读
拼音qiú shàn xíng
简拼qsx
笔顺打印球扇形笔顺打印
汉字拆解球扇形

词语解释

又称球分”、球心角体”。一个扇形绕着一条不通过它的内部的直径旋转一周所得的几何体。扇形的弧旋转所形成的球冠或球带称为球扇形的底，这个球冠或球带的高称为球扇形的高。设球扇形的高为h,球半径为r,则球扇形的体积为v=23πr2h。

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  1. #0 [time:0.0001s] SELECT * FROM le_runtime WHERE k='cfg' LIMIT 1
  2. #1 [time:0.0002s] SELECT * FROM le_cms_ciyu WHERE id='147418'
  3. #2 [time:0.0001s] SELECT * FROM le_runtime WHERE k='cate_3' LIMIT 1
  4. #3 [time:0.0003s] SELECT * FROM le_cms_ciyu WHERE id='147418' LIMIT 1
  5. #4 [time:0.0002s] SELECT * FROM le_user WHERE uid='1' LIMIT 1
  6. #5 [time:0.0002s] SELECT * FROM le_cms_ciyu_data WHERE id='147418' LIMIT 1
  7. #6 [time:0.0002s] SELECT * FROM le_cms_ciyu_views WHERE id='147418' LIMIT 1
  8. #7 [time:0.0002s] UPDATE LOW_PRIORITY le_cms_ciyu_views SET views=views+1 WHERE id='147418' LIMIT 1
  9. #8 [time:0.0001s] SELECT * FROM le_runtime WHERE k='2f927c3729eeb7168f41d4001d52093b' LIMIT 1
  10. #9 [time:0.0001s] SELECT * FROM le_runtime WHERE k='81864f9513bb6c88661744025bf28ef2' LIMIT 1
  11. #10 [time:0.0001s] SELECT * FROM le_runtime WHERE k='b8e0905ed362cbddc6e9c0b8f61711bb' LIMIT 1
  12. #11 [time:0.0001s] SELECT * FROM le_runtime WHERE k='5a5b03036593ce1d40cb5d407c8c958b' LIMIT 1
  13. #12 [time:0.0001s] SELECT * FROM le_runtime WHERE k='e146bcb60f6218100a21a008e8eabe40' LIMIT 1
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