By calculating, it can be found that the potential energy in magnetic field is different from the normal potential energy, it is a function of both coordinates and time.
通过计算发现，磁场中的势能不同于通常意义的势能，它既可以是位置坐标的函数，也可以是时间的函数。
Methods: The cognitive function of 70 cases with IDA and 30 normal school-agers were studied by means of IQ and event-related potential (ERP) determination.
方法：采用智商(IQ)、事件相关电位(erp)测试的方法对70例ida、30例正常小学生的认知功能进行对照测查。
Methods: The cognitive function of 70 cases with IDA and 30 normal school-agers were studied by means of IQ and event-related potential (ERP) determination.
方法：采用智商(IQ)、事件相关电位(erp)测试的方法对70例ida、30例正常小学生的认知功能进行对照测查。
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