（）光纤被称为色散位移光纤。

A.C-12->VC-12->TU-12->TUG-2->VC-3->AU-4->AUG
B.C-12->VC-12->TU-12->VC2->TUG-2->TUG-3->AU-4->AUG
C.C-12->VC-12->TU-12->TUG-2->TUG-3->VC-4->AU-4->AUG
D.C-12->VC-12-->TU-12->TUG-2->VC-3->TUG-3->AU-4->AUG

A.20个
B.30个
C.40个
D.60个

A.192.1THz
B.193.1THz
C.195.1THz
D.196.1THz