甲是万能献血者，乙是万能受血者．则甲、乙的血型分别为_1型、_2型．

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甲是万能献血者，乙是万能受血者．则甲、乙的血型分别为____型、____型．

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O,AB

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Here is the bulletin board in Class 2. Some of the notes can be seen every day. Here are some notes before a holiday. Please read them and answer the following questions.

We want to say thanks to Miss Wang, our dear teacher. We couldn't have a wonderful English class without you. Class 2	I am thankful to Annie for lending me the pen. I'll remember to bring mine next time. Mary
The class meeting will be held this Thursday. The topic is “Thanks a lot.”Please get ready. Class 2	A thousand thanks to John . He always helps me clean the windows when I am busy. Julia
Many thanks to Jack for helping with my Chinese homework. Tom	I'm thankful to know that I have so many kind students. I love you all. Miss Wang

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