Đáp án: cố lên bn nhé
Giải thích các bước giải:
H2O nuoc
HNO3 axit nitric
H2SO4 axit sulfuric
ZnSO4 kem sunfat
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.