A.基牙负荷过大
B.固位体固位力不够
C.牙体固位形差
D.冠与基牙不密合
E.基牙折断
[单选题]( ).A.a=b=3B.a=2/3,b=5/2C.a=3/2,b=1/2D.a=-2,b=-3
[单选题]( ).A.a=b=3B.a=2/3,b=5/2C.a=3/2,b=1/2D.a=-2,b=-3
[单选题]( ).A.a=b=3B.a=2/3,b=5/2C.a=3/2,b=1/2D.a=-2,b=-3
[单选题]A.条件(1)充分,但条件(2)不充分B.条件(2)充分,但条件(1)不充分C.条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起来充
[单选题]A.条件(1)充分,但条件(2)不充分B.条件(2)充分,但条件(1)不充分C.条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起来充
[单选题]A.±2.5mB.±7.5mC.±4.5mD.±5m