General study question [複製鏈接]

原文章由 mansdom 於 07-11-29 21:11 發表
Can anyone tell which of the following is not obtained from petroleum

1)  petrol
2)  gas
3)  natural gas
4)  coal

and why

原文章由 mansdom 於 07-11-29 21:11 發表
Can anyone tell which of the following is not obtained from petroleum

1)  petrol
2)  gas
3)  natural gas
4)  coal

and why

原文章由 mansdom 於 07-11-29 21:11 發表
Can anyone tell which of the following is not obtained from petroleum ( petroleum is the crude oil from the earth)

1)  petrol  - (it is the fuel e.g. for cars that made from petroleum)

2)  gas - (can be any kind of gas if not specify, including the natural gas)
3)  natural gas (means the gas found together with petroleum when the earth is drilled, it is a kind of fuel also)
4)  coal ( coal is also the fuel made from wood million years ago)

and why

原文章由 TinaWu 於 07-11-29 22:42 發表


Gas, what kind of gas??