Negative and interrogative
1) A woman isn't speaking to the doctor now. Is woman speaking to the doctor now?2) My brother isn't waiting for an important phone call.Is my brother waiting for an important phone call?3) The birds aren't flying high up in the sky.Are the birds flying high up in the sky?4) You aren't speaking too loudly.Are you speaking too loudly?5) The students aren't discussing something in the library.Are the students discussing something in the library?6) Peter isn't surfing the Net in his room.Is Peter is surfing the Net in his room?7) Julia and her sister aren't choosing dresses for the party.Are Julia and her sister choosing dresses for the party?8) I am not looking for my report.Am I looking for my report?9) The water isn't boiling in the kettle.Is the water boiling in the kettle?10) It isn't getting colder.Is it getting colder?Archimedes. Why in the first place was the ancient Greek scientist? First of all, because he is one of the greatest mathematicians of all times, close he came to the calculation of the number of "PI". Today all students and students of the daily study and enjoy the discoveries of the Greek. Also Archimedes was famous for the invention of many useful machines. Among these are the siege guns, and mirrors, поджигающие sails on the Roman ships by focusing sunlight. Archimedes made the first theorist of mechanics. For example, he presented the complete theory of the lever, applying it in practice. Also, scientists have developed a Archimedes screw (screw), with the help of which вычерпывается water and the present day. The primacy of the inventor of merit - all of it was opened more than two thousand years ago, when there were no computers, no technology available today, the inventors. Archimedes, perhaps, he studied in the libraries of Alexandria, but most of his knowledge was acquired independently.
