In the early part of the 20th century, physicians discovered that blood transfus

游客2024-06-29  9

问题 In the early part of the 20th century, physicians discovered that blood transfusions often failed because ______. [br] A baby’s blood type is decided by ______.

选项 A、his father or his mother
B、his mother and his father
C、his grandparents
D、himself

答案 B

解析 此题可根据常识来做,孩子的血型由父母决定。
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