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问题 单项选择题

直流稳压电源通常由电源、电压器、整流电路、滤波电路和稳压电路组成，其中整流电路的作用是将交流电压变成（）的直流电压。

A.恒定

B.理想

C.脉动

D.不变

答案

参考答案：C

单项选择题

The nurse is caring for a client with bipolar disorder in a manic state. Which of the following nursing interventions should be included in the plan of care

A. Allowing the client to exhibit hyperactive, demanding, manipulative behavior without setting limits.
B. Listening attentively with a neutral attitude and avoiding power struggles.
C. Offering high-calorie meals and ply encouraging the client to finish all food.
D. Insisting that the client remain active through the day so that he’ll sleep at night.
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单项选择题 B型题

糖尿病足患者的主要表现是（）

A.呼吸深而大，带烂苹果味

B.向心性肥胖，痤疮，高血压等

C.足部疼痛，皮肤溃疡和肢端坏疽

D.甲状腺肿大，震颤，有杂音

E.饥饿感，心慌，手颤
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