Answer:
<u><em>Mất khoảng 1 năm thì khăn giấy mới phân hủy được</em></u>
Explanation:
answer to question 7 - Tube 4: Amylase present, body temperature (37ºC)
answer to question 9 - Hydrogen bonds between water and another substance
Answer:
each person chooses one
Explanation:
each family for example will go on to choose one another