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关注：1
2013-05-23 12:21
求翻译：But there are two problems. First, it does not always work. Sometimes people die when they have blood transfusion. Later, doctors find that we do not all have the same kind of blood．There are four groups?O, A, B and AB．We all have blood of one of these groups. They also find that they can give any kind of blood to peop是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
But there are two problems. First, it does not always work. Sometimes people die when they have blood transfusion. Later, doctors find that we do not all have the same kind of blood．There are four groups?O, A, B and AB．We all have blood of one of these groups. They also find that they can give any kind of blood to peop
问题补充： |
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