97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区 狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

單項(xiàng)選擇題

已知點(diǎn)M(10,0,15),點(diǎn)N(10,15,0),點(diǎn)E(15,10,0), 點(diǎn)F(10,0,20)屬于重影點(diǎn)的是()

A.點(diǎn)M和點(diǎn)N
B.點(diǎn)N和點(diǎn)E
C.點(diǎn)E和點(diǎn)F
D.點(diǎn)F和點(diǎn)M

微信掃碼免費(fèi)搜題