A.任何二端網(wǎng)絡 B.任何有源二端網(wǎng)絡 C.有源二端口網(wǎng)絡 D.任何二端口網(wǎng)絡
A.4.4A B.2A C.5.5A D.2.4A
A.774.4W B.966W C.287.2W D.440W