He didn't do his best, so I didn't ____ ____ ____ him.
判断下列句子是否正确,用“正确”或“错误”表示。
Let's go.( )
我国人口的空间分布特点是( )
命题p:菱形的对角线互相垂直,则p的否命题是____, ¬p是____.