单项选择题使用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.