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[单选题]
符合ITU-TG.652要求的单模光纤;上行应使用()波长;下行应使用()波长。
A.1260nm~1360nm;1480nm~1500nm
B.1260mm~1360mm;1480mm~1500mm
C.1260Cm~1360Cm;1480Cm~1500Cm
D.1260m~1360m;1480m~1500m
查看答案
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A.1260nm~1360nm;1480nm~1500nm
B.1260mm~1360mm;1480mm~1500mm
C.1260Cm~1360Cm;1480Cm~1500Cm
D.1260m~1360m;1480m~1500m
光缆的传输模式,可依传输距离而定,长距离和距离较短时宜分别采用()。
A.单模光纤、多模光纤
B.多模光纤、单模光纤
C.单模光纤
D.多模光纤