问题
单项选择题
成人的主要造血器官是()。
A.骨髓
B.肝
C.脾
D.淋巴结
E.胸腺
答案
参考答案:A
解析:[知识点] 造血系统及血细胞功能
成人的主要造血器官是()。
A.骨髓
B.肝
C.脾
D.淋巴结
E.胸腺
参考答案:A
解析:[知识点] 造血系统及血细胞功能
One day , one of his friends said to him , “My friend , you take two eggs to the market every day and sell 小题3: there . There is too much trouble . Why not take out all the eggs once from her 小题4: ?” The man liked the idea , but he wouldn’t make a 小题5:to kill the hen . A few days 小题6: he decided to kill the hen because he thought his friend’s 小题7: was very good , and it was really tiring to take the eggs to the market 小题8: . The next day he killed the hen and the opened the hen’s stomach . But he couldn’t find 小题9: in the stomach . He looked for the eggs here and there , left and 小题10: , up and down , but there was nothing inside . |