Which dog will you choose?-- The dog which followed me just now.
Which box is heavy?-- The box whom he is lifting is very heavy.
at the top of 指的是尖端的顶部.如山顶.
on the top of指的是平物的顶部.如书桌.
on top of指的是抽象的东西的顶部.如嗓音.
in the top在顶部的内部.
Which dog will you choose?-- The dog which followed me just now.
Which box is heavy?-- The box whom he is lifting is very heavy.
at the top of 指的是尖端的顶部.如山顶.
on the top of指的是平物的顶部.如书桌.
on top of指的是抽象的东西的顶部.如嗓音.
in the top在顶部的内部.