图示T形截面梁，其剪应力沿梁高度的分布规律是：[img=100x125]1803724c2733f9f.png[/img]
A: [img=234x125]1803724c320f4be.png[/img]
B: [img=189x125]1803724c3e91cd7.png[/img]
C: [img=197x125]1803724c4a42c4d.png[/img]
D: [img=193x125]1803724c559557b.png[/img]
A: [img=234x125]1803724c320f4be.png[/img]
B: [img=189x125]1803724c3e91cd7.png[/img]
C: [img=197x125]1803724c4a42c4d.png[/img]
D: [img=193x125]1803724c559557b.png[/img]
举一反三
- 设随机变量X~B(3, 0.4)，[img=102x27]18037032d38dcea.png[/img], 则P(Y=1)的值为 A: 0.504 B: 63/125 C: 0.432 D: 0.288 E: 0.496 F: 27/125 G: 36/125 H: 4/25
- 设随机变量X~B(3, 0.4)，[img=102x27]1802d3ec87fec7a.png[/img], 则P(Y=1)的值为 A: 0.504 B: 63/125 C: 0.432 D: 0.288 E: 0.496 F: 27/125 G: 36/125 H: 4/25
- 设随机变量X~B(3, 0.4)，[img=102x27]1802d3e98bc8803.png[/img], 则P(Y=1)的值为 A: 0.504 B: 63/125 C: 0.432 D: 0.288 E: 0.496 F: 27/125 G: 36/125 H: 4/25
- 设正态分布N(0, 4)的分布函数为F(x)，则F’(x) = ( ). A: [img=73x63]1802f2c47707b95.png[/img] B: [img=86x65]1802f2c47feb07a.png[/img] C: [img=75x58]1802f2c4884644b.png[/img] D: [img=87x58]1802f2c48fffbbf.png[/img]
- 设正态分布N(0, 4)的分布函数为F(x)，则F’(x) = ( ). A: [img=73x63]1802f2a8aba67a6.png[/img] B: [img=86x65]1802f2a8b46de33.png[/img] C: [img=75x58]1802f2a8bcdd988.png[/img] D: [img=87x58]1802f2a8c497bb0.png[/img]