Tính phân từ khối của các chất có CTHH sau

a)Axit sunfuric H2SO4

b) Natri Photphat Na3Po4

Giúp mình vs ạ

Mình cần gấp

31. My mother took me to the zoo yesterday

…………………………………………………………………………….

32. Blair invented a color television in 1928.

…………………………………………………………………………….

33. John gave me these records last week.

…………………………………………………………………………….

34. Our club holds meetings once a month.

…………………………………………………………………………….

35. She doesn’t find anything in that box.

…………………………………………………………………………….

Choose the best answer.

We are looking for ____ place to spend ____ night.

Choose the best answer.

Please turn off ___ lights when you leave ___ room.

Choose the best answer.

I like _____ colorful costumes of ____ ethnic minority people in Vietnam.