Which is NOT correct description about Medullary bone? [originaltext] Scientis

游客2024-10-30  3

问题 Which is NOT correct description about Medullary bone?
Scientists have discovered evidence that a dinosaur found in Montana was a female. Scientists have never before been able to reliably determine the sex of fossilized dinosaurs.  The latest discovery gives them a tool to identify at least some females. What they found was a layer of something called medullary bone inside the thighbone of a dinosaur dug up five years ago. Scientists had cut the bone into two pieces to get it into a helicopter.  Medullary bone is only known in ovulating birds, it’s a source of calcium that birds draw to make shells for their eggs. Writing in the journal Science, the scientific team believes the bone layer could be a way to identify other female dinosaurs but only if they died while making eggs and were then fossilized. They point out that the discovery confirms the view that modem birds are the closest living relatives of the two-legged dinosaurs.

选项 A、Medullary bone is only known in ovulating birds before.
B、It is full of calcium.
C、Birds draw calcium in it to make shells for their eggs.
D、A dinosaur doesn’t have medullary bone.

答案 D

解析 keep,keep. Those we don’t ,let go.”可见他认为应该关闭关塔那摩监狱,对于那些他们有理由将其扣留的犯人,就继续实行扣留,而对于没有证据的犯人,就释放。因此只有选项C最接近他的想法。
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