A.s B.ms C.us
A.波幅增大 B.波幅不变 C.波幅减小
A.低于报警电平 B.高于报警电平 C.达到报警电平 D.B和C
A.n=50%e=1.5s=65% B.n=52%e=1.1s=63% C.n=55%e=1.1s=62% D.n=52%e=1.4s=63%
A.2根 B.3根 C.4根
