问题描述：
[单选]
一名3岁儿童在吞下两瓶β-肾上腺recptor激动剂后被送进急诊科。下列哪个符号是不可能的？A 3-year-old child has been admitted to the emergency department having swallowed the contents of two bottle of β-adrenorecptor agonist drug． Which of the following sign is not possible？
A．扩张支气管Bronchodilation
B．心脏加速Cardiac acceleration
C．肾脏释放肾素增加Renin release from the kidneys
D．皮肤血管扩张Vasodilation of blood vessels of the skin
E．扩瞳Mydriasis
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上一篇：以下哪一项是睫状肌（M3受体）在聚焦近物体时收缩的主要第二信使过程？Which of the following is the primary second-messenger process in the contraction of the ciliary muscle （M3 receptor） when focusing on near objects ？
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