焊接方法对金属焊接性的影响主要表现在()。
A、焊后热处理
B、坡口形式
C、热源性质和保护方式
D、装配质量
参考答案:C
The policeman asked Mr. Smith .
A.what did his car look like
B.how was his car
C.how his car looks
D.what his car looked like
患者,缺失,间隙较大,如果行双端固定桥修复,为了减轻桥体所受的力,以下方法哪个不正确()
A.减少面颊舌径
B.扩大面舌外展隙
C.加深面颊舌沟
D.增加耠面副沟
E.脱离耠接触