一个比的前项是4,后项正好是前项的倒数,这个比的比值是+B'e9r-?)t6U8a/s0|;g(J6w'v8w4s2o8~9b1Z.e9l-G1b)G5]+`3`+Q(C9P5m0N,J3A
A. 49b1Z.e9l-G1b)G5]+`3`+Q(C9P5m0N,J3A
B. 19b1Z.e9l-G1b)G5]+`3`+Q(C9P5m0N,J3A
C.1/169b1Z.e9l-G1b)G5]+`3`+Q(C9P5m0N,J3A
D.169b1Z.e9l-G1b)G5]+`3`+Q(C9P5m0N,J3A