Water is removed from reservoirs and undergoes several stages of treatment to make it suitable for drinking.
Which statements about the stages are correct?
1- Chlorine is added to the water to kill harmful bacteria.
2- Water is heated to remove dissolved oxygen gas.
3- Water is filtered to remove solids.
1 )
1 only
2 )
1 and 2
1 and 3
4 )
2 and 3
تحلیل ویدئویی تست
منتظریم اولین نفر تحلیلش کنه!
پرسش و پاسخ های مشابه
سوال کنید یا به سوالات دیگران پاسخ دهید ...