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初中三年制物理第二册(人教版)有这样一道题目: 一商品仓库,后门进货,前门取货。现有红、绿两只灯泡和一个电铃装在一块木板上,另有一个电池组,两个开关,还有若干导线。利用这些材料,请你为仓库值班员设计一个电路:电铃响同时红灯亮,表示取货人在前门按开关;电铃响同时绿灯亮,表示送货人在后门按开关。请你在方框内画出电路。
The junior high school three-year physics second volume (PEP) has such a problem: a commodity warehouse, the rear door to purchase, the front door to pick up. The existing red and green bulbs and a bell mounted on a wooden board, another battery pack, two switches, and several wires. Using these materials, please design a circuit for the warehouse attendant: The bell will ring at the same time as the red light, indicating that the picker will press the switch at the front door; the bell will ring at the same time as the green light, indicating that the delivery person presses the switch at the back door. Please draw a circuit in the box.