The area of section is A, the centroid is C and the moment of inertia of section with respect to the z axis is[img=14x22]1803a25ae5167bc.png[/img] , then [img=21x22]1803a25aee78117.png[/img] is .[img=185x110]1803a25af82e370.jpg[/img]
A: [img=55x26]1803a25b03408a9.jpg[/img]
B: [img=99x21]1803a25b0d903ef.jpg[/img]
C: [img=71x53]1803a25b1883f79.jpg[/img]
D: [img=85x56]1803a25b22f93d9.jpg[/img]
A: [img=55x26]1803a25b03408a9.jpg[/img]
B: [img=99x21]1803a25b0d903ef.jpg[/img]
C: [img=71x53]1803a25b1883f79.jpg[/img]
D: [img=85x56]1803a25b22f93d9.jpg[/img]
举一反三
- 该梁左侧第一排支座负筋为[img=810x377]180369db6f4ef9d.png[/img] A: 2[img=108x156]180369db79d338f.png[/img]22 B: 2[img=108x156]180369db79d338f.png[/img]25 C: 4[img=108x156]180369db79d338f.png[/img]22 D: 4[img=108x156]180369db79d338f.png[/img]25
- 该梁左侧第二排支座负筋为[img=810x377]1803985b172991d.png[/img] A: 2[img=18x21]1803985b1f8888e.png[/img]22 B: 2[img=18x21]1803985b1f8888e.png[/img]25 C: 4[img=18x21]1803985b1f8888e.png[/img]22 D: 4[img=18x21]1803985b1f8888e.png[/img]25
- 该梁左侧第二排支座负筋为[img=810x377]1802dead2051cdd.png[/img] A: 2[img=18x21]1802dead28c3ca5.png[/img]22 B: 2[img=18x21]1802dead28c3ca5.png[/img]25 C: 4[img=18x21]1802dead28c3ca5.png[/img]22 D: 4[img=18x21]1802dead28c3ca5.png[/img]25
- 随机变量 X 服从均匀分布[img=296x96]17de89393460b92.png[/img]则D(X)=( ). A: 4.5 B: 25/12 C: 1/5 D: 1
- 令F(x):x是有理数,G(x):x是实数。将命题“所有的有理数都是实数,但有的有实数不是有理数”符号化为() 未知类型：{'options': ['17e0a83a4157352.jpgx(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))'], 'type': 102}