• 2022-06-03
    图示悬臂梁和简支梁的长度相等,它们的_______。[img=1390x341]1803da5fab8e439.png[/img]
    A: [img=18x22]1803da5fb4cf90c.png[/img]图相同,M图不同
    B: [img=18x22]1803da5fb4cf90c.png[/img]图不同,M图相同
    C: [img=18x22]1803da5fb4cf90c.png[/img]、M图都相同
    D: [img=18x22]1803da5fb4cf90c.png[/img]、M图都不同
  • C

    举一反三

    内容

    • 0

      梁在集中力偶作用截面处_______。 未知类型:{'options': ['1803da6079a44b3.png图有突变,M图无变化', 'M图有突变,[img=18x22]1803da6079a44b3.png[/img]有折角', 'M图有突变,[img=18x22]1803da6079a44b3.png[/img]无变化', 'M图有突变,[img=18x22]1803da6079a44b3.png[/img]图有折角'], 'type': 102}

    • 1

      若 X, Y,满足DX=DY=[img=18x22]1803dfef6dae947.png[/img],E(XY)=EXEY,则D(X-2Y)的值是( )(A)2 [img=18x22]1803dfef6dae947.png[/img] (B)3 [img=18x22]1803dfef6dae947.png[/img] (C)4 [img=18x22]1803dfef6dae947.png[/img] (D)5[img=18x22]1803dfef6dae947.png[/img] A: 2 [img=18x22]1803dfef98590fb.png[/img] B: 3 [img=18x22]1803dfef98590fb.png[/img] C: 4 [img=18x22]1803dfef98590fb.png[/img] D: 5[img=18x22]1803dfef98590fb.png[/img]

    • 2

      ‌已知三次函数f(x)=(1/3)[img=18x22]1802e2b148262dd.png[/img]-(4m-1)[img=18x22]1802e2b1512ca3b.png[/img]+(15[img=23x22]1802e2b159732bb.png[/img]-2m-7)x+2在x∈(-∞,+∞)是增函数,则m的取值范围是().‍‌‍ A: m<2或m>4 B: -4<m<-2 C: 2<m<4 D: m>4

    • 3

      若 X, Y,满足DX=DY=[img=18x22]17de6024b9b2db4.png[/img],E(XY)=EXEY,则D(X-2Y)的值是( )(A)2 [img=18x22]17de6024b9b2db4.png[/img] (B)3 [img=18x22]17de6024b9b2db4.png[/img] (C)4 [img=18x22]17de6024b9b2db4.png[/img] (D)5[img=18x22]17de6024b9b2db4.png[/img] 未知类型:{'options': ['2[img=18x22]17de6024b9b2db4.png[/img]', '3[img=18x22]17de6024b9b2db4.png[/img]', '4[img=18x22]17de6024b9b2db4.png[/img]', '5[img=18x22]17de6024b9b2db4.png[/img]'], 'type': 102}

    • 4

      两根简支斜梁如图所示,承受竖向均布载荷,但右端可动铰支座支承方式不同,则这两根梁的内力图之间的关系为( )[img=352x133]1802f8d53bdedcd.jpg[/img] A: M图与[img=20x22]1802f8d5445d106.png[/img]图相同,[img=22x22]1802f8d54d4ae28.png[/img]图不同 B: M图、[img=20x22]1802f8d5445d106.png[/img]图和[img=22x22]1802f8d54d4ae28.png[/img]图均相同 C: M图、[img=20x22]1802f8d5445d106.png[/img]图和[img=22x22]1802f8d54d4ae28.png[/img]图均不相同 D: M图与[img=20x22]1802f8d5445d106.png[/img]图不同,[img=22x22]1802f8d54d4ae28.png[/img]图相同