October 2018 2 329 Report

Na katodę fotokomórki padają fotony o energii 5 eV każdy. Wybite elektrony mają mak­symalną energię kinetyczną równą 2 eV. Praca wyjścia dla materiału katody wynosi


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3Complete the text with have, had or has.Another storytellerBill Bryson is a fantastic writer. Most of his books are about travelling. He (1) _____ written books likeThe Lost Continent andNotes from a Small Islandas well as many others. I have read a lot of his books, and I (2) _____ always found myself crying, but crying with laughter – they are so funny.Bryson was born in the USA and lived there all his childhood. He decided to go back-packing round Europe after he (3) _________ graduated. He fell in love with the UK, and went to live and work there after he(4) _____ met and married his English wife. Bryson and his family eventually went back to the USA and stayed for18 years, until returning to the UK in 1995. He (5) _____ already written a few books, and with his writing experience he soon found a job in journalism. He stayed in the UK for eight years then went back to the States again. He and his wife returned to the UK in 2003 and they (6) _____ lived there since then.Bryson’s travel books are based on his own funny experiences as he wandered around new countries, getting to know them and their people. But he (7) _____ not just written travel books. He (8) _____ written books on the English language and on science too. In his science book, A Short History of Nearly Everything, he manages to be scientific, accurate and funny too – not easy!Since 2005, Bryson (9) _____ been doing other things too: he’s been made the head of DurhamUniversity, an old university in the North of England. Talent and laughter (10) _____ been good friends to him throughout his life. He has made so many people laugh.
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