重力梯度稳定卫星稳定的条件是
A: [img=91x25]1802ce556976eb8.png[/img]
B: [img=91x25]1802ce557205541.png[/img]
C: [img=91x25]1802ce557a3b5fe.png[/img]
D: [img=91x25]1802ce55839fbd8.png[/img]
A: [img=91x25]1802ce556976eb8.png[/img]
B: [img=91x25]1802ce557205541.png[/img]
C: [img=91x25]1802ce557a3b5fe.png[/img]
D: [img=91x25]1802ce55839fbd8.png[/img]
举一反三
- 设自旋卫星为理想刚体，其自旋轴为x轴，则其自旋稳定的条件是 A: [img=114x25]1802ce4bc1acdbc.png[/img] B: [img=114x25]1802ce4bca8c1ad.png[/img] C: [img=91x25]1802ce4bd2475d0.png[/img] D: [img=91x25]1802ce4bdadc92f.png[/img]
- 设谓词[img=52x25]1802f91b185ad94.png[/img]代表“x等于y”，个体变元x，y的个体域都为{1，2，3}，则以下选项真值为1的是？ A: [img=91x25]1802f91b2152648.png[/img] B: [img=91x25]1802f91b2a5b319.png[/img] C: [img=70x25]1802f91b332b39a.png[/img] D: [img=91x25]1802f91b3bde27f.png[/img] E: [img=91x25]1802f91b4467156.png[/img] F: [img=103x25]1802f91b4c2a763.png[/img]
- 设随机变量X的分布函数F(x),下列结论中不一定成立的是（ ）. A: [img=91x25]18034e6b10abc1c.png[/img] B: [img=91x25]18034e6b18defa6.png[/img] C: [img=102x25]18034e6b217563e.png[/img] D: F(x)为连续函数
- 原电池（-）Pt︱Fe[img=17x22]1803dd54de61136.png[/img](1 mol·L[img=17x22]1803dd54e7299c0.png[/img]),Fe[img=17x22]1803dd54f0030fb.png[/img](1 mol·L[img=17x22]1803dd54fa39c0d.png[/img])‖Ce[img=17x22]1803dd5502f9d6b.png[/img]( mol·L[img=17x22]1803dd550b82a7d.png[/img]) ,Ce[img=17x22]1803dd55130efd2.png[/img]( mol·L[img=17x22]1803dd551af174c.png[/img]) ︱Pt(+)的电池反应是( )。 A: Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] = Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] B: Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] = Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] C: Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] = Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] D: Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] = Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img]
- 基数是3的集合是？ A: 空集 B: [img=110x25]18032d926f64d29.png[/img] C: [img=91x25]18032d9277d6159.png[/img] D: {x | x是选修北京科技大学离散数学慕课的人}