下列属于L形结点无荷载作用情况的是( )。
A: [img=205x141]18034ddb3d4ef4c.png[/img]
B: [img=232x198]18034ddb4715336.png[/img]
C: [img=140x106]18034ddb51b5401.png[/img]
D: [img=181x114]18034ddb5c8b262.png[/img]
A: [img=205x141]18034ddb3d4ef4c.png[/img]
B: [img=232x198]18034ddb4715336.png[/img]
C: [img=140x106]18034ddb51b5401.png[/img]
D: [img=181x114]18034ddb5c8b262.png[/img]
举一反三
- 下列属于L形结点,且受到与其中一杆轴重合的荷载作用的情况是( )。 A: [img=205x141]18034ddb4ca4072.png[/img] B: [img=140x106]18034ddb57a2a34.png[/img] C: [img=181x114]18034ddb621f220.png[/img] D: [img=232x198]18034ddb6dba8da.png[/img]
- Which of the following propositions is false,set A = {x,x is an integer and[img=60x23]1803a1c6eebb7a3.png[/img]} ? ( ) A: [img=113x25]1803a1c6f77ce06.png[/img] B: [img=139x25]1803a1c7001fe79.png[/img] C: [img=51x22]1803a1c70863f61.png[/img] D: {x|x is an integer and |x| 4}[img=33x22]1803a1c711a7c63.png[/img]
- Which of the following propositions is false,set A = {x,x is an integer and [img=60x23]1803a1c503ffa04.png[/img]} ? ( ) A: [img=113x25]1803a1c50cc3162.png[/img] B: [img=139x25]1803a1c514e60ea.png[/img] C: [img=51x22]1803a1c51dd52ef.png[/img] D: {x|x is an integer and |x| <4} [img=33x22]1803a1c525cf1bd.png[/img]
- 已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ,则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]
- 已知f(x)=x,g([img=17x17]1803ba6e9f63ed6.png[/img],[img=17x17]1803ba6ea7375f0.png[/img],[img=17x17]1803ba6eaef4fad.png[/img])=[img=17x17]1803ba6e9f63ed6.png[/img]*([img=17x17]1803ba6ea7375f0.png[/img] +1), 其中x,[img=17x17]1803ba6e9f63ed6.png[/img],[img=17x17]1803ba6ea7375f0.png[/img] ,[img=17x17]1803ba6eaef4fad.png[/img]均为自然数,新函数h可递归的构造如下:h(0,x) = f(x), 且h(S(n), x) = g(h(n,x),n,x),请按递归式进行计算下列式子,不正确的是_____。 A: h(1,x) = x B: h(2,x) = 2x C: h(3,x) = 6x D: h(4,x) = 12x