如下图，将新鲜的血液分别放入A,B,C,D四支试管中，其中A,B试管中加入抗凝剂，C,D试管中不加任何物质，静置24小时后，其中正确的图示是

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如下图，将新鲜的血液分别放入A,B,C,D四支试管中，其中A,B试管中加入抗凝剂，C,D试管中不加任何物质，静置24小时后，其中正确的图示是（）

A：

B：

C：

D：

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B

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Every year people celebrate the Spring Festival in China. Usually it is in January or February. It's the most important(重要的) festival in China. So before it comes, everyone buys many things, and they often make a special kind of food called dumplings. It means “come together”. Parents always buy new clothes for their children and children also buy presents for their parents. On the Spring Festival eve(除夕), all the family members come back home. They sing, dance and play cards. When they enjoy the meal, they give each other the best wishes(祝愿) for the coming year. They all have a good time.

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