• 2022-05-31
    已知两条直线[img=70x23]18034401d28488f.png[/img],[img=111x23]18034401db2118a.png[/img],其中[img=46x20]18034401e4d0584.png[/img],当这两条直线的夹角在[img=48x39]18034401ecd2377.png[/img]内变动时,[img=10x14]18034401f64458e.png[/img]的取值范围是( )
    A: [img=42x29]18034401fe88e38.png[/img]
    B: [img=78x48]1803440206edefe.png[/img]
    C: [img=139x48]180344021045bcb.png[/img]
    D: [img=58x30]18034402193dd6f.png[/img]
  • 举一反三