牙体缺损最常见的原因是
A．楔状缺损B．龋病C．牙外伤D．磨损E．发育畸形
参考答案：B
________ is as much an art as it is ________ science.
A．Cloning; a
B．Clone; /
C．To clone; the
D．Cloning; the
热毒炽盛，正气不支，邪陷厥阴，扰动肝风，蒙蔽心包，可引起（）
A.毒窜睾腹
B.邪陷心肝
C.温毒在表
D.热毒壅盛
E.邪炽气营
