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1.解:①CD⊥AB,AC⊥BC;
②AO⊥OC,BO⊥OD,OC⊥BD.检验略.
2.解:(1)如图37所示,AD即为所求.
(2)如图37所示,BE,CF即为所求.
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零五网免费提供各类练习与测试答案,请牢记零五网网址:05W.CC
1.解:①CD⊥AB,AC⊥BC;
②AO⊥OC,BO⊥OD,OC⊥BD.检验略.
2.解:(1)如图37所示,AD即为所求.
(2)如图37所示,BE,CF即为所求.
http://m.ksjqmj.com/lianxiyuceshidaan/24152.html
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