A、<span style=";font-family:宋体;font-size:14px">有统一的时钟信号</span><span style=";font-family:'Times New Roman';font-size:14px"> </span></p><p><br/></p>
B、<span style=";font-family:宋体;font-size:14px">没有统一的时钟信号</span><span style=";font-family:'Times New Roman';font-size:14px"> </span></p><p><br/></p>
C、<span style=";font-family:宋体;font-size:14px">各触发器同时作用</span><span style=";font-family:'Times New Roman';font-size:14px"> </span></p><p><br/></p>
D、<span style=";font-family:宋体;font-size:14px">各触发器各自作用</span><span style=";font-family:'Times New Roman';font-size:14px"> </span></p><p><br/></p>
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