让我们看一看，可以用"let us look it”吗？

"let us look it”不符合日常的用法，look是不及物动词，要加介词at.应该let us look at it,或者let us have a look，或者let us see it.

look 后接宾语时得加at
let's look at it .表示专心看看这个事物。
一般口语里就用see，let us see it.
it 其实可以省略在口语里，省略后还有
让我们思考，想想的意思
let us see.=let us think about it.

let us have a look at it 事物
let us see it 景观
let us watch it 电视电影等
let us read it 书籍等

要看你看的是什么

let's have a look.
let's look at it.

应该是
Let's have a look (at it).

let's have a look

let's see (more orally)