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重庆三江花园平面图 模内标签的生产工艺是什么?
(2014?浙江模拟)如图,三棱柱ABC-A1B1C1中,∠CAA1=∠A1AB=∠BAC=90°,AB=AA1=1,AC=2.(1)求证:A1 (1)证明:∵CAA1=∠BAC=90°,∴CA⊥AA1,CA⊥AB,∵A1A∩AB=A,∴C...
(2014?浙江模拟)如图,三棱柱ABC-A1B1C1中,∠CAA1=∠A1AB=∠BAC=90°,AB=AA1=1,AC=2.(1)求证:A1 (1)证明:∵CAA1=∠BAC=90°,∴CA⊥AA1,CA⊥AB,∵A1A∩AB=A,∴C...