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单选题
成年人身体不再长高的原因是（）。
A
年龄大，骨的成分发生变化
B
红骨髓变成黄骨髓
C
骨膜内的成骨细胞不再分裂
D
骺端的软骨层骨化成骨
参考答案
参考解析
解析：
骨的生长主要包括两个方面，即骨的长长与长粗，在骨的结构中与生长有关的结构有骨骺端的软骨层和骨膜中的成骨细胞。骨表面的骨膜内层有成骨细胞具有再生功能，对骨折后骨的愈合起作用，它还能不断产生新的骨细胞使骨不断长粗。人在幼年的时候，骨骺端的软骨层能够不断产生新的骨组织使骨不断长长，但到成年后这些软骨就骨化成骨不再生长了：因此人成年以后身体不再长高，故选D。
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考题
单选题_____ is a folk legend brought to England by Anglo-Saxons from their continental homes. It is a long poem of over 3000 lines and the national epic of the English people.A
BeowulfB
Sir Gawain and the Green KnightC
The Canterbury TaleD
King Arthur and His Knights
考题
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wonderful but tiringB
hard but meaningfulC
difficult and terribleD
boring and disappointing
考题
单选题（）能使教师及时了解学生在该阶段的音乐学习情况，及时反馈教学信息，发现学生音乐学习过程中存在的问题，以便及时调整和改进音乐教学工作。A
综合性评价B
定性评价C
形成性评价D
终结性评价
考题
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comes across as reliable evidenceC
increases the chance of being penalizedD
constitutes part of the investigation
考题
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考题
单选题删除文章中的某个错字，除可用Del（Delete）键外，还可用（）来完成。A
EnterB
SpaceC
BackspaceD
Insert
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