【单选题】A man’s blood type is A, whose father is AB and mother is O. If he married a woman whose father is O and mother is B. Then their children’s blood type can be
【简答题】Mr. White is from the USA. He is o 小题1: English teacher. His classes are very interesting. We all l 小题2: him. There are four p 小题3: in Mr. White’s family: Mr. White , his wife and his two sons---Tom a...