题干

使体循环和肺循环两条循环路线连在一起的器官是(    )

A:肺

B:心脏

C:毛细血管

D:组织

上一题 下一题 0.0难度 选择题 更新时间:2016-11-07 10:01:08

答案(点此获取答案解析)

B

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In the Spring Festival, Jonny sent each of his classmates a card with best wishes, but he received ________.