试题选项中不是按钮开关（动断按钮）图形符号的是(____)。
A<img src="/tupian/shandong/dinghongjian/dinghongjian08.jpg"/>
B<img src="/tupian/shandong/dinghongjian/dinghongjian09.jpg"/>
C<img src="/tupian/shandong/dinghongjian/dinghongjian10.jpg"/>
D<img src="/tupian/shandong/dinghongjian/dinghongjian12.jpg"/>