问题
单项选择题
成年以后不具有造血功能的骨髓存在于()
A.椎骨
B.胸骨
C.长骨髓腔内
D.股骨近侧端松质内
E.肱骨近侧端松质内
答案
参考答案:C
解析:6岁前后,长骨内的红骨髓逐渐转化为黄骨髓,红骨髓仅保留于椎骨、肋骨、胸骨、髂骨及肱骨和股骨近侧端的骨松质内,继续造血。
成年以后不具有造血功能的骨髓存在于()
A.椎骨
B.胸骨
C.长骨髓腔内
D.股骨近侧端松质内
E.肱骨近侧端松质内
参考答案:C
解析:6岁前后,长骨内的红骨髓逐渐转化为黄骨髓,红骨髓仅保留于椎骨、肋骨、胸骨、髂骨及肱骨和股骨近侧端的骨松质内,继续造血。
阅读理解。 | |||||
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1. On Saturday morning, you can _____. | |||||
[ ] | |||||
A. go to watch a ball game B. take children to play games at the City Theatre C. go to the Central Park for a picnic | |||||
2. The Red Birds ballgame _____. | |||||
[ ] | |||||
A. is in the afternoon B. is outside C. is at the gate | |||||
3. You can eat many different food from all over the world if you _____. | |||||
[ ] | |||||
A. go to the City Theatre B. go to the Central Park C. buy tickets at the gate | |||||
4. "The Zoo" is _____. | |||||
[ ] | |||||
A. a US concert B. a park with many red birds in it C. a music group | |||||
5. Mr. Turner wants to have a nice Saturday. Which is not possible for him to do? | |||||
[ ] | |||||
A. Watching a ballgame and having a picnic. B. Having a picnic and seeing a film. C. Listening to a concert and watching a ballgame. |