Which of the following discharge instructions should the nurse give the parents of an infant with a temporary colostomy

A. Flush the stoma with tap water at least once a day.
B. Allow the diaper to absorb the colostomy drainage.
C. Give the infant plenty of liquids to drink.
D. Expect the stoma to become dusky red within 2 weeks.

由于工件材料.切削条件不同，切削过程中常形成（）、（）、（）、（）等四种切屑。