What is special about a stem cell?
A.It can become another type of cell.
B.It can be obtained from another type of cell.
C.It can turn a brain cell into a kidney cell.
D.It can turn a kidney cell into a brain cell.
正确答案是A
What is special about a stem cell?
A.It can become another type of cell.
B.It can be obtained from another type of cell.
C.It can turn a brain cell into a kidney cell.
D.It can turn a kidney cell into a brain cell.
正确答案是A