主要含神经毒的毒蛇是( )
A．竹叶青蛇B．尖吻蝮蛇C．眼镜王蛇D．烙铁头蛇E．银环蛇
参考答案：E
-__________ do you usually go to school?
-I usually go to school by bus.[ ]
A. Where
B. When
C. How
车间电源供电时的联锁保护。
