零件上的裂纹、破损等损伤缺陷的修复方法。
参考答案：
采用焊接，钎焊或钳工机械加工法。
A few years ago the belief became general________orange juice and milk should never be drunk at the same meal.
A．which
B．that
C．and that
D．what
空心砖墙砌筑中途停歇时，应（）。
A．将墙顶砌平
B．砌成斜茬
C．砌成直茬
D．留置施工缝
