第27题: [单项选择]Promethazine hydrochloride (Phenergan) 35 mg IM is ordered for a client who is experiencing nausea and vomiting after surgery. The ampule’s label reads 25 mg/mL. How many mL should the nurse prepare to administer A. 0.7 mL. B. 1.0 mL. C. 1.4 mL. D. 1.8 mL. 参考答案:C 答案解析:35mg/x mL=25mg/mL, x=1.4mL.