脐带短于______cm为脐带过短。脐带超过______cm为脐带过长。脐带先露为______,脐带隐性脱垂为______,脐带脱垂为_____________。
如图脐带血管有3条,A是______,B是______。血管周围胶样结缔组织如图中C称为______。
— What would you like to have, meat or fish?
— _____________________.
— ___________________
— Once or twice a week.
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