at, in, on表方位的区别

at, in, on   三者均表示地点,“在……处”

at:用于指较小的地方,如:We’ll meet each other at the park.
用于门牌号码前,    如:My grandparents live at 105 Beijing Road.

in 用于指较大的地方,如:She lived in Hong Kong for 20 years.
on 一般指与面或线接触,如:Put the pictures on the wall.

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