心内右向左分流导致的发绀又称_________,如__________;心功能不全或静脉回心血流受阻,血液淤滞所致的发绀又称_________,如__________;动脉导管未闭合并艾森曼格综合征时出现的发绀又称__________。
— What would you like to have, meat or fish?
— _____________________.
— ___________________
— Once or twice a week.
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