当P（1）=P（0）=1/2时，对于传送单极性基带波形和双极性基带波形的最佳判决门限电平各为多少？
参考答案：
单极性：A/2，双极性：0。
Never in my wildest dreams ____ lead to a career in the NBA, which has allowed me to give back to my people in Africa.
A．I thought the chance would
B．I thought would the chance
C．did I think the chance would
D．did I think would the chance
对于PSC有关防火安全的检查，下面说法不正确的是（）。
A．通风机能在总控站予以停止
B．应注意脱险通道的有效性，保证重要的门不得锁闭，通道和楼梯不得堵塞
C．通风系统的主出风口可不装有关闭装置
D．通风系统的主进风口应装有关闭装置
