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  3. Passage Two [br] What is the advantage of laughing gas over other more advanced

Passage Two [br] What is the advantage of laughing gas over other more advanced

游客2023-10-22  10
问题 Passage Two [br] What is the advantage of laughing gas over other more advanced options?
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答案 It doesn’t need a professional anesthesiologist．
解析 第6段提到了推广笑气的原因，最后两句都表明就算一些小型医院没有常驻的麻醉师，产妇自己就可以使用笑气，由此可见，与其他更先进的麻醉手段相比，笑气的优点就在于它不需要专业的麻醉师，所以本题答案是It doesn’t need a professional anesthesiologist，其中professional一词可省。
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