• 2022-05-31
    已知两条直线[img=70x23]1803dc5e1061f45.png[/img],[img=111x23]1803dc5e19d8c16.png[/img],其中[img=46x20]1803dc5e22d1a63.png[/img],当这两条直线的夹角在(0,[img=18x39]1803dc5e2b7cf06.png[/img])内变动时,[img=10x14]1803dc5e3549384.png[/img]的取值范围是( )
    A: [img=42x29]1803dc5e3f32035.png[/img]
    B: [img=78x48]1803dc5e4800914.png[/img]
    C: [img=139x48]1803dc5e5047c7a.png[/img]
    D: [img=58x30]1803dc5e5a8142d.png[/img]