使用8253的某个计数模块产生2MS的定时，已知输入的高频脉冲信号的频率为2MHZ,若采用二进制计数方式，则写入8253的计数初值为

单项选择题Lisa wants to be certain she has done all she can do to help her business survive, so she has written a business plan. One advantage of developing the plan is that it _____. A、forces Lisa to think carefully about all aspects of her planned business. B、enables Lisa to switch herself from a sole proprietorship to a corporation without any further paperwork. C、focuses Lisa’s attention on her personal talents and experiences. D、makes Lisa feel how successful she is.

单项选择题保险人已经履行赔偿或给付全部保险金义务后，如无特别约定，保险合同即