半径为[img=14x19]1802e54805206e6.png[/img]的半球形水池装满水，现将水全部吸完，需要做功 = ( )
A: [img=159x52]1802e54810708bd.png[/img]
B: [img=139x52]1802e5481ac4c8b.png[/img]
C: [img=92x52]1802e548233aa37.png[/img]
D: [img=92x52]1802e5482b64510.png[/img]
A: [img=159x52]1802e54810708bd.png[/img]
B: [img=139x52]1802e5481ac4c8b.png[/img]
C: [img=92x52]1802e548233aa37.png[/img]
D: [img=92x52]1802e5482b64510.png[/img]
举一反三
- 半径为[img=14x19]1802ce0971c7b95.png[/img]的半球形水池装满水，现将水全部吸完，需要做功 = ( ) A: [img=159x52]1802ce097b230cc.png[/img] B: [img=139x52]1802ce0986594ef.png[/img] C: [img=92x52]1802ce098f9b490.png[/img] D: [img=92x52]1802ce099831a26.png[/img]
- 半径为[img=14x19]1802ce0c22890ef.png[/img]的半球形水池装满水（水的密度为1），现将水全部吸完，需要做功 = ( ) A: [img=159x52]1802ce0c2cf2495.png[/img] B: [img=139x52]1802ce0c38f69f1.png[/img] C: [img=92x52]1802ce0c41472eb.png[/img] D: [img=92x52]1802ce0c4a1f149.png[/img]
- 半径为[img=14x19]1802f66212d35d7.png[/img]的半球形水池装满水（水的密度为1），现将水全部吸完，需要做功 = ( ) A: [img=159x52]1802f6621e22dbc.png[/img] B: [img=139x52]1802f66227cf8a7.png[/img] C: [img=92x52]1802f662309f98d.png[/img] D: [img=92x52]1802f6623928022.png[/img]
- 半径为R的半球形水池装满水,现将水全部吸完,需要做的功等于( ). 未知类型：{'options': ['', ' [img=83x35]17e0c2311bab891.png[/img]', ' [img=127x35]17e0c2312806131.png[/img]', ' [img=81x35]17e0c23134e7498.png[/img]'], 'type': 102}
- 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]