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When cryopreserving ( ), after thawing, it is necessary to mix the saliva in the container thoroughly before use, otherwise the measurement result will be in error.
When cryopreserving ( ), after thawing, it is necessary to mix the saliva in the container thoroughly before use, otherwise the measurement result will be in error.
A、Hair
B、Blood
C、Saliva
D、Urine
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