对α受体和β受体均有激动作用的是( )。
A.去甲肾上腺素 B.异丙肾上腺素 C.可乐定D.肾上腺素 E.多巴酚丁胺
参考答案:D
解析: 肾上腺素受体激动药分类
青春期是人生的转折时期,也是向成人过度的阶段,也是人生中最宝贵的时期。[ ]
You can hardly imagine the difficulty the woman had _____ her children.[ ]
A. brought up
B. to bring up
C. bringing up
D. to have brought up