用手拉合刀闸开关和向设备中送煤样时，要做到（）。
A.脚踏绝缘皮带
B.手戴防护手套
C.脸正对开关
D.用潮湿手指接触电器按钮
参考答案：A, B
If he _____ my advice, he wouldn't have lost his job. [ ]
A. followed
B. should follow
C. had followed
D. would follow
该邮电局邮政储蓄和代办保险收入应纳营业税( )。
A．7710元
B．9590元
C．12850元
D．20560元
