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分子中有甲磺酰胺基，为非选择性β受体拮抗剂，用于心律失常
分子中有甲磺酰胺基，为非选择性β受体拮抗剂，用于心律失常
多巴胺结构为
多巴胺结构为
Questions are based on the passage you have just heard．
Questions are based on the passage you have just heard． A．[B]Sleep may improve m
[A]They develop their identities within peer groups． [B]They
[A]They develop their identities within peer groups． [B]They receive informal ed
[题共用备选答案]A．哌替啶 B．可待因 C．芬太尼 D．吗啡 E．喷他佐辛
[题共用备选答案]A．哌替啶 B．可待因 C．芬太尼 D．吗啡 E．喷他佐辛