编程时（）由编程者确定，可根据编程方便原则，确定在工件的适当位置。
A、工件原点
B、机床参考点
C、机床原点
D、对刀点
参考答案：A
母体的免疫球蛋白能通过胎盘转移给胎儿的是（）
A.IgA
B.IgM
C.IgG
D.IgD
E.IgE
The nurse is providing care for a client with multiple myeloma, a disorder characterized by episodes of remissions and exacerbations. Which of the following resources can best help the client adapt to the disease（）
A. The client’s family.
B. Support group.
C. Pastoral care.
D. Hospice care.
