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前鼻韵母与后鼻韵母的发音区别，一是发音时舌头活动区域有舌面前部与舌面后部的不同，二是两者发完因收口的口形有开闭的不同。
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Directions:Please revise the paragraph (修改后的段落应符合简洁性、长短句相间以及句式多样化原则).He was born in a small village. His father was a teacher in the village school. His mother did the housework. He began to go to his father's school at seven. He graduated from it six years later. Then he went to the junior middle school in a nearby town. He studied at a senior middle school in the county seat. He was a good student there. He got good marks at the college entrance examinations. He wanted to build a highway for his home village in future. He loved his village very much.
UI皮肤具有哪些作用？
在第21届冬奥会上，我国花样滑冰老将申雪、赵宏博夺得金牌，20多年的执着追求终于如愿以偿。这启示我们
俄国寓言大师克雷洛夫说：“现实是此岸，理想是彼岸，中间隔着湍急的河流，行动则是架在河上的桥梁”。这比喻告诉我们：()。①理想不是现实，二者对立统一②理想可以转化为现实③理想的实现要靠实践④理想是理想，现实是现实，二者没有直接联系
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