单项选择题
A.NA=0 B.NA=0.11 C.NA=0.22 D.0.33
A.G.652 B.G.653 C.G.654 D.G.655
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
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