رد: The tenth day of the English competition
 

شفتي الظلم ياشوق:139:

رد: The tenth day of the English competition
 

Air is a mixture of gases in varying amounts. It consists of 78% nitrogen, 21% oxygen, argon and other inert gases to the extent of about 1.0%. In addition, carbon dioxide is another important constituent of the atmosphere which varies in amount from 0.1% to 0.3%. The variation is mainly due to combustion photosynthetic processes. The other gases, e.g., sulphur dioxide, nitrogen dioxide, ozone, etc. are found in very small quantities. Water vapor is also an important constituent which varies from region to region.

رد: The tenth day of the English competition
 

:(204):

vote for 1 :(269):

رد: The tenth day of the English competition
 

زين ما في احد من علم الاجتماع مشارك هنا اجل والا كان طلعوني ههههههههههههههههه :71:

رد: The tenth day of the English competition
 

مبررررروك شوكلاته :mh001:

رد: The tenth day of the English competition
 

لا خطآ نيتروجين اند اوكسجين << وش فيها اليوم معارضآآت

<< بيطيرونك الحين

رد: The tenth day of the English competition
 

:16.jpg: هو وضميره :hahahahahah:

رد: The tenth day of the English competition
 

HNOO :verycute:


عشان قوتشي :verycute::icon9:


سوري :verycute:

رد: The tenth day of the English competition
 

مسا الخير ياسمين

نورتي اختي وحياك معنا

هم طالبين نووي ماباليد حيلة مافيها شوي شوي :biggrin:

رد: The tenth day of the English competition
 

اسفه والله احسبك تبي تطلعها بعد :sm1: :sm1: :sm1: