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Although extreme and singular events occur in a black hole, its event horizon boundary is ________: space travelers crossing it would be subject to the same physical laws that apply anywhere else.
- A.illusory
- B.obscure
- C.unremarkable
- D.immutable
- E.unchanging
- F.commonplace
C,F显示答案
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以上解析由 考满分老师提供。
