咩係交線牙?!~ 急'''''

erica

2007-04-19 4:16 am

咩係交線牙?!~

唔識牙!

http://hk.myblog.yahoo.com/kitlkw92/article?mid=19&new=1

回答 (1)

Bon

2007-04-19 6:32 am

✔ 最佳答案

The line of intersection between two planes.

http://www.puishing.edu.hk/subject/Maths/download/Trigo_3D_2.pps#4

參考: http://www.puishing.edu.hk/subject/Maths/download/Trigo_3D_2.pps#4

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