Objective To explore the effect of health education on the mental state of patients with time selecting operation.
目的探讨健康教育对择期手术前患者精神状态的影响。
Performance of flyback converter with DCM and CCM is compared , methods of selecting operation modes according to the load are pointed out.
比较了CCM和DCM模式反激变换器的工作情况，指出根据负载选择工作模式的方法。
Performance of flyback converter with DCM and CCM is compared , methods of selecting operation modes according to the load are pointed out.
比较了CCM和DCM模式反激变换器的工作情况，指出根据负载选择工作模式的方法。
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