根据Lingo程序写出相应模型[img=281x108]1803bc669a04e84.png[/img]
A: [img=155x125]1803bc66a38c143.png[/img]
B: [img=161x138]1803bc66ace8615.png[/img]
C: [img=195x120]1803bc66b750253.png[/img]
D: [img=154x118]1803bc66c3573f6.png[/img]
A: [img=155x125]1803bc66a38c143.png[/img]
B: [img=161x138]1803bc66ace8615.png[/img]
C: [img=195x120]1803bc66b750253.png[/img]
D: [img=154x118]1803bc66c3573f6.png[/img]
举一反三
- 如图所示简支梁。梁上所受外载见图，其中分布式弯矩作用在BC段，其集度为[img=129x25]1802d89c1f30bbf.png[/img]。梁在BC区间(2m<x<5m)区间的M(x)表达式为 ( ) (单位为[img=51x19]1802d89c26b4c34.png[/img])[img=1041x604]1802d89c351d5b6.jpg[/img] A: 2-0.3x B: 2-0.7x C: 2+0.2x D: 2+0.7x
- 逻辑代数式[img=916x95]17d609d8f86532e.png[/img]的给定约束条件为[img=480x73]17d609d907e823a.png[/img]，其最简与或式是。（） A: A’+BC’+B’C B: AC' +B’C’+BC C: A'B+B’C’+BC D: A+B’C’+BC
- 如图，AC[img=14x19]1803dc6183c68f0.png[/img]BC于点C，BC=a，CA=b,AB=c，[img=14x19]1803dc618c0b01d.png[/img][img=14x19]1803dc6194fb0cf.png[/img]与直线AB、BC、CA都相切，则[img=14x19]1803dc618c0b01d.png[/img][img=14x19]1803dc6194fb0cf.png[/img]的半径等于多少？[img=554x174]1803dc61affa68c.jpg[/img] A: c+b+a B: c-b+a C: [img=62x44]1803dc61b93185f.png[/img] D: [img=62x44]1803dc61c21f842.png[/img]
- 如图，AC[img=14x19]1803b534f3cc7be.png[/img] BC于点C，BC=a，CA= b,AB= c，[img=14x19]1803b534fc32384.png[/img][img=14x19]1803b53504f8742.png[/img]与直线AB、BC、CA 都相切，则[img=14x19]1803b534fc32384.png[/img][img=14x19]1803b53504f8742.png[/img]的半径等于多少？[img=554x174]1803b5352131d22.jpg[/img] A: c+b+a B: c-b+a C: [img=62x44]1803b53529eaaf2.png[/img] D: [img=62x44]1803b535357aac3.png[/img]
- 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}