试举例分析儿歌的三种类型。
参考答案:
1)丰富生动的知识性儿歌
2)寓教于乐的教育性儿歌
3)童趣盎然的游戏性儿歌
根据首字母或汉语提示补全单词,使句意完整。
1.We usually have lunch in our d_________ (餐厅).
2.Is there a l_____ (图书馆) in your school?
3.Tom is taller than me, he sits b ______ me.
4.--- Where is the ______(体育馆)?
--- It's in front of our school library.
5.--- Are there any science l______ (实验室)in the teaching building?
在CT定位确定靶区时,下列一般不需要考虑的是()
A.体位的重复误差
B.设备的机械误差
C.肿瘤自主和不自主的运动误差
D.靶区的扫描时间
E.肿瘤的大小