【单选题】【消耗次数：1】
仅作为吸入给药的平喘药是（ ）。
①
特布他林
②
布地奈德
③
沙美特罗
④
氨溴索
⑤
沙丁胺醇
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沙丁胺醇、特布他林为
①
α-受体激动药
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β\sub1\nosupersub-受体激动药
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β\sub2\nosupersub-受体激动药
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H\sub1\nosupersub受体激动药
⑤
N\sub1\nosupersub受体
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