• 2022-06-07
    In the angle constraint, "Undirected Angle" method, the defined angle does not have directionality, only has the effect of limiting the size. The "Undirected Angle" icon is:
    A: [img=51x34]1803a1763ead47f.png[/img]
    B: [img=51x34]1803a17648ef13f.png[/img]
    C: [img=219x102]1803a176538fbdc.png[/img]
    D: [img=28x25]1803a1765d58d94.png[/img]
  • A

    举一反三

    内容

    • 0

      在下列命题中:如果f(x)=[img=28x44]17e0bf9914bb2f1.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=28x44]17e0bf992111a1c.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=55x44]17e0bf992d8de0a.png[/img],那么[img=29x29]17e0bf9939482bb.png[/img]f(x)不存在;如果f(x)=[img=87x53]17e0bf99450fa82.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0。其中错误命题的个数是( A: 0 B: 1 C: 2 D: 3

    • 1

      X~N(1,1), 密度函数为[img=37x25]18038fe689205b5.png[/img], 分布函数为F(x), 则( ) A: [img=198x25]18038fe690a03ee.png[/img] B: [img=101x25]18038fe69af96aa.png[/img] C: [img=67x25]18038fe6a3b8e5b.png[/img][img=118x25]18038fe6ab93d6f.png[/img] D: F(x)=F(-x)

    • 2

      若f(x)+f(-x)=0, 则[img=95x39]17da608af452d96.jpg[/img]. 若f(x)=f(-x), 则 [img=170x38]17da60541207426.jpg[/img]

    • 3

      The cantilever beam shown here is subjected to two equal and opposite couples,for the section B( ).[img=414x136]1803a25c3173b7f.jpg[/img] A: The deflection is zero, the angle of rotation is not zero B: The deflection is not zero, the angle of rotation is zero C: Deflection and angle of rotation are both not zero D: Both deflection and angle of rotation are both zero

    • 4

      角度约束中的“未定向角度”方式,定义的角度不具有方向性,只具有限制大小的作用。“未定向角度”方式的图标为: A: [img=51x34]18030876b81fbff.png[/img] B: [img=219x102]18030876c226ae2.png[/img] C: [img=219x102]18030876cd85bef.png[/img] D: [img=51x34]18030876d8893c4.png[/img]