试题选项中不是断路器图形符号的是(____)。
A<img src="/tupian/shandong/dinghongjian/dinghongjian03.jpg"/>
B<img src="/tupian/shandong/dinghongjian/dinghongjian05.jpg"/>
C<img src="/tupian/shandong/dinghongjian/dinghongjian06.jpg"/>
D<img src="/tupian/shandong/dinghongjian/dinghongjian07.jpg"/>