Đáp án:
Giải thích các bước giải:
2H2 + O2 -> 2H2O
PTHH : 2$H_{2}$ + $O_{2}$ ------> 2$H_{2}O$
Choose the best answer.
We are looking for ____ place to spend ____ night.
Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.