[多选题]CRH1A型动车组转向架轴箱上还装有用于不同功能的轴箱辅助装置，主要包含以下部件: 。
A.碳刷装置(保护接地或牵引回流)
B.速度传感器(WSP, LKJ1和LKJ2)
C.ATP速度传感器
D.轴温报警装置

Parents with an adopted child wonder, when and how to tell their child that he or she is adopted. They also want to know if there are special problems for an adopted child.
Child and adolescent psychiatrists (精神病学家) recommend that the child be told about the adoption by the adoptive parents. Children should be told about their adoption in a way that they can understand.
There are two different views on when a child should be told about the adoption. Many experts believe the child should be told at earliest age possible. This approach provides the child an early opportunity to accept and integrate the concept of being "adopted". Other experts believe that telling a child too early may confuse the young child who can’t really understand the event. These experts advise waiting until the child is older.
In either case, children should learn of their adoption from the adoptive parents. This helps give the message that adoption is good an
A. be told the truth once he or she is adopted
B. be informed of the fact that he or she is adopted as early as possible
C. be told the truth by the adoptive parents themselves
D. always be kept in the dark about the fact through channels other than the adoptive parents.