【单选题】【消耗次数：1】
在下列超声软指标中，建议行介入性产前诊断的是（）
①
侧脑室增宽
②
孤立性右心室强回声
③
孕18周提示双侧脉络丛囊肿
④
孕24周提示双侧肾盂分离5mm
⑤
孤立性单脐动脉
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