AC汇流条转换功能是什么？
A、可以允许并联供电
B、可由任一发电机或外部电源供电
C、只能由外部电源或APU发电机供电
参考答案：B
— Hi, Tracy. Would you like to go to the cinema tonight?
— ________, James, but I have to work.[ ]
A. No way
B. My pleasure
C. That's right
D. Thanks
依据《职业病目录》，尘肺属于法定职业病。
