试题选项中表示灯的图形符号是(____)。
A<img src="/tupian/shandong/dinghongjian/dinghongjian17.jpg"/>
B<img src="/tupian/shandong/dinghongjian/dinghongjian22.jpg"/>
C<img src="/tupian/shandong/dinghongjian/dinghongjian23.jpg"/>
D<img src="/tupian/shandong/dinghongjian/dinghongjian24.jpg"/>