在我国古代,笔位居文房四宝的首位,这充分显示了笔的重要性。那么,接下来就让我们一起来看看现在的笔吧! 一、铅笔常见的铅笔有两种:一是用木材固定铅笔芯的铅笔;一是把铅笔芯装入细长塑料管并可移动的活动铅笔。不管是什么样的铅笔,其核心部分都是铅笔芯。铅笔芯 In ancient China, the pen ranked first in the four treasures, which fully shows the importance of the pen. Then, let us take a look at the pen now! First, the pencils There are two common pencils: First, the pencil with a pencil to fix the pencil core; First, the pencil into the slender plastic tube and can be moved Activity pencil. No matter what kind of pencil, the core part is the pencil lead. Pencil lead