lâu quá rùi

rất chính xác

ok

hỏi hay đấy! nhưng tuần sau mới thi haha

(−C6H10O5−)n+nH2O−H2SO4,to−>nC6H12O6

C6H12O6−30−35oC,xtenzim−>2C2H5OH+2CO2

C2H5OH+O2−Men Giấm−>CH3COOH+H2O

CH3COOH+C2H5OH<−H2SO4đ,140oC−>CH3COOC2H5+H2O

Mid_Autumn festival is one of the popular celebrations in the Viet Nam. Every year,it's on the 15th day of the 8th lunar month. It's organized so that people celebrate the largest full moon in the year. In that festival, children wear masks, parade on the street have parties with special cakes and lots of fruits. 
I feel happy when taking part in it because it makes me exited and helps me remember about my childish

A
 

He spent three days repairing these machines