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According to the passage, why couldn’t PET and functional M. R. I. scans detect subtle changes in blood flow earlier?

发布日期:2022-07-11

According to the passage, why couldn’t PET and fun...
A

Because there is early oxygen transfer.

B

Because they do not form their images quickly enough to follow such rapid changes.

C

Because researchers control the changes in blood flow.

D

Because early oxygen transfer gives the flow blood energy.

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