宇宙临界密度约为 [img=51x26]1803b4ce7dda71c.png[/img]。
A: [img=41x22]1803b4ce8bf9c61.png[/img]
B: [img=41x22]1803b4ce948fb99.png[/img]
C: [img=41x22]1803b4ce9c9593d.png[/img]
D: [img=41x22]1803b4cea5eeca0.png[/img]
A: [img=41x22]1803b4ce8bf9c61.png[/img]
B: [img=41x22]1803b4ce948fb99.png[/img]
C: [img=41x22]1803b4ce9c9593d.png[/img]
D: [img=41x22]1803b4cea5eeca0.png[/img]
举一反三
- X射线的波长大约是多少()m? A: [img=35x22]1802e152a714827.png[/img] B: [img=35x22]1802e152afa6fc1.png[/img] C: [img=41x22]1802e152b83ed97.png[/img] D: [img=41x22]1802e152c1f483f.png[/img]
- Planck 时间约为 A: [img=41x22]180318d2d5c57cb.png[/img]s B: [img=41x22]180318d2de4b22f.png[/img]s C: [img=41x22]180318d2e68efbe.png[/img]s D: [img=41x22]180318d2eedb2e1.png[/img]s
- Planck 时间 A: [img=41x22]180317698525eaa.png[/img]s B: [img=41x22]180317698e95f23.png[/img]s C: [img=41x22]18031769971365e.png[/img]s D: [img=41x22]180317699f87154.png[/img]s
- Planck 长度约等于 A: [img=41x22]18039bfadbd7cbe.png[/img]m B: [img=41x22]18039bfae4df2fb.png[/img]m C: [img=41x22]18039bfaedf9c09.png[/img]m D: [img=41x22]18039bfaf88b4c6.png[/img]m
- Planck 长度约等于 A: [img=41x22]1803342d7f6af21.png[/img]m B: [img=41x22]1803342d885b52e.png[/img]m C: [img=41x22]1803342d91105a6.png[/img]m D: [img=41x22]1803342d9a17a68.png[/img]m