New century pen

I am a multi-function pen newly invented by Dr.

My clothes are made of a special light metal. This metal is harder than iron, lighter than paper, and does not grow long. Fire, knife, grab, can't take it.

I am still a very knowledgeable teacher, and the computer doctors are not as good as me. I don't know one of the unsolved mysteries in the world. I am the best student in the stationery class! You want to use me to cheat, hey, no way!

I am a multi-functional speaker. If you don't understand the knowledge during class, you can tell me your question and let me help you out. If you tie that, switch to pencil, pen, erasable pen... . Just tell me the pen you want, I will switch for you.

I can also remind you that "three ones" if you hold the pen, the pen tip will automatically retract: if your head is not lifted, the red light will light up, I will tell you: "Master, master Your head is about to leave the table." If your body leans against the table, the original pencil, I will become a pen, so you can't write.

If you want to buy a multi-functional me, please pay 10,000 yuan, and be listed in the 30th century!

Third grade: Chen Yizhen