头颅矢状面与台面呈53°位的是()
A.瓦氏位
B.柯氏位
C.瑞氏位
D.斯氏位
E.梅氏位
参考答案:C
-- You won the first prize in the English competition.
-- ____________ I always fail in English tests.
A.Why not?
B.Good idea!
C.Sounds great!
D.You're kidding!
比特差错率