如图是一个汽车车门报警装置逻辑电路图，图中的两个按钮开关分别装在汽车的两扇门上．只要打开任意一扇门，即电路中任何一个开关处于断开状态，发光二极管就发光报警．清你根据报警装置的要求，在电路图的虚线框内画出门电路符号，并完成该门电路的真值表．

If you are forced to abandon ship in a liferaft，your course of action should be to（）.

A.remain in the immediate vicinity

B.head for the nearest land

C.head for the closest sea-lanes

D.let the persons in the boat vote on what to do