题目内容：
如图，在三棱锥P-ABC中，PA⊥平面ABC，AB⊥BC
（1）证明：PB⊥BC
（2）若PA=AB=BC，秋二面角A-PC-B的大小
选择题：如图，在三棱锥P-ABC中，PA⊥平面ABC，AB⊥BC（1）证明：PB⊥BC（2）若PA=AB=BC，秋二面角A-PC-B的大小
- 题目分类：高考
- 题目类型：选择题
- 查看权限：VIP
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