Specific writing as shown in the figure below:
M has three paintings, which occupy a space in a book with four lines and three grids. Write a vertical line (|) in the middle grid first, the vertical line should be above the middle grid, then write a right-angled vertical line on the vertical line, and then write a right-angled vertical line, so that you can write a correct M. Please note that a right-hand vertical line cannot be written as a horizontal polyline.
M is the letter 13 in the Latin alphabet, which comes from the Greek word μ, μ and was originally used by semu people to describe water. In both classical and modern languages, the nasal consonants of both lips are pronounced.
The case of m has different meanings in different places, which means1000 in Roman numerals; In the international system of units, m stands for Mega, that is, one million (10 to the sixth power); The size of the network speed is also "m".