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The two main sources are the telivision and and the newspaper.
mustard and tomatoe ketchup... :)
primary sources and secondary sources.
the Holy Quran, and the prophet Muhammad (pbuh) Sunna (his sayings and practices) All other sources are based on these two main sources and should not contradict with them.
Fossil fuels (coal, oil, natural gas) and nuclear fuel (uranium)
Carbohydrate,fat