炉膛吹灰器吹灰顺序应按照烟气介质的流动方向进行.
参考答案:对
要使前牙排列美观、需注意以下几个方面、除了()
A.使整个面部比例和谐
B.考虑患者年龄、肤色
C.征求患者意见
D.考虑个性因素
E.粘膜厚度
The representative of the committee was asked to verify his earlier statement.
A.confirm
B.withdraw
C.repeat
D.modify