病人矫治成功的关键是
A．前牙排齐B．破除口腔不良习惯C．注意口腔卫生D．尖牙后移至牙列中E．后牙支抗控制
参考答案：E
Some people care much about their appearance and always ask if they look fine in ________ they are
wearing.
A．that
B．what
C．how
D．which
电流互感器本身造成的测量误差是由于有励磁电流的存在
