(  ).

A (0，0) B (0，3) C (3，0) D (1，1)

A f(1)>f(-1) B f(1)<f(-1) C |f(1)|>|f(-1)| D |f(1)|<|f(-1)|

A 1 B 2 C -1 D -2

A E-αα^T不可逆 B E+αα^T不可逆 C E+2αα^T不可逆 D E-2αα^T不可逆

A A与C相似，B与C相似 B A与C相似，B与C不相似 C A与C不相似，B与C相似 D A与C不相似，B与C不相似

A A与B相互独立 B A与B互不相容 C AB与C相互独立 D AB与C互不相容

A <img width="160" height="31" src="https://www.beizhujiaoyu.com/uploads/202208/20210520001000_6328.jpg" title="" align="" alt="" /> B <img width="160" height="17" src="https://www.beizhujiaoyu.com/uploads/202208/20210520001002_6015.jpg" title="" align="" alt="" /> C <img width="160" height="32" src="https://www.beizhujiaoyu.com/uploads/202208/20210520001002_7890.jpg" title="" align="" alt="" /> D <img width="160" height="22" src="https://www.beizhujiaoyu.com/uploads/202208/20210520001004_7890.jpg" title="" align="" alt="" />