Skin contains millions of sensory receptors which inform the brain, through electrical ______, when you have injured yourself.
皮肤在人体受伤时，会通过“sensory receptor”向大脑发出信号，C、D选项与全句的意思相符。A 强迫，强制；冲动；B 猛推；逼迫；E闪光；一瞬间；F模仿，仿效。句意是，“人体受伤时，皮肤中数百万计的感觉感受器会通过电脉冲向大脑传递讯息。”