学习主行，了解手部区域，并在浏览器中完成以准确性为先的练习。
Day 1 · Step 1 of 3
Feel for the raised bumps on F and J. Place your index fingers there, then let your other fingers rest naturally on the neighbouring keys.
Left hand
Right hand
Press or tap each home-row key. 0 of 8 placed.