A.9 B.6 C.3 D.4
A.与门 B.与非门 C.或非门 D.异或门
A.心电 B.肌电 C.脑电 D.神经电
A.双色滤光片代替单色滤光片 B.多色滤光片代替单色滤光片 C.单色(光)器代替了滤光片 D.用多色(光)器代替了滤光片
A.0.2,0.5 B.0.2,0.3 C.0.5,0.2 D.0.3,0.2