低 b 問題

Beside the above, you will harden the iron bar. After the iron is heated, the atoms in the iron will be aligned more better, like crytals. When you cool it down suddenly, the iron will keep that cystaline structure and become more hard. This is called hardening.

咁就要睇下你倒幾多水落去,,
如果小GE話,,D水就會熱,,
然後開始蒸發囉....
如果多GE話,,
D水就會蓋住D熱力,,
最後咪唔熱LOR...

變黑左囉
高級d睇顏色放落水會令到鐵ge硬性變化