A . 5%
B . 20%
C . 40%
D . 50%
E . 80%
[单选题]上颌第二前磨牙单根管者约为A.5%B.20%C.40%D.50%E.80%
[单选题]上颌第二前磨牙单根管者约为A.18%B.38%C.46%D.60%E.86%
[单选题]上颌第二前磨牙单根管者约为A.5%B.20%C.40%D.so%E.80%
[单选题]上颌第二前磨牙单根管者约为A.5%B.20%C.40%D.50%E.80%
[单选题]上颌第二前磨牙单根管者约为A.5%B.20%C.40%D.50%E.80%
[单选题]上颌第二前磨牙单根管者约为A.5%B.20%C.40%D.50%E.80%
[B单选题]上颌第二前磨牙单根管者约为A.5%B.20%C.40%D.so%E.80%
[单选题]上颌第二前磨牙单根管者约为( )A.18%B.38%C.46%D.60%E.86%
[单选题]上颌第二前磨牙单根管者约为( )A.18%B.38%C.46%D.60%E.86%
[单选题]上颌第二前磨牙单根管的约为A.5%B.20%C.40%D.50%E.80%