题目

许多楼道灯有着这样的功能：天黑时，出现声音它就开启，而在白天即使有声音它也没反应，它的控制电流中接入                                                                                                             传感器开关和     光  传感器开关，从这些传感器来的信号，通过一个                                                                                     （选填“非门”、“与门”或“或门”）电路后，进入执行电路．在图中的虚框内画出两种传感器开关控制的楼道灯电路图．                                                                                                                                                                                                                                答案：声音；光；与．如图所示；

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