The _____ of wearing a white wedding gown was brought to our country from the West.[ ]

A. customs

B. tradition

C. feast

D. festival

锅炉给水中添加联胺的作用是（）。

A.辅助除氧

B.对氧化铁、氧化铜有还原作用

C.提高温度

D.提高压力