单选题:(题共用备选答案)A.普萘洛尔 B.去甲肾上腺素 C.异丙肾上腺素 D.多巴胺 E.酚妥拉明具有同时阻断β1和β2受体的

题目内容:
(题共用备选答案)
A.普萘洛尔
B.去甲肾上腺素
C.异丙肾上腺素
D.多巴胺
E.酚妥拉明
具有同时阻断β1和β2受体的药物是(  )
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