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Đề bài : ...-/./-..-/ ---/-.-./.-/-./../--/./ Chú ý : Đề rất dễ cái khó là đọc được đề bài :>> Gợi ý : Đây là mã Morse Mong mod không xóa ^^* Ngoài lề : Ai có típ học Morse không ạ , cho em xin với ;-;
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Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions. Martin Cooper (born December 26, 1928) is an American engineer. He is a pioneer and visionary in the wireless communications industry. With eleven patents in the field, he is recognized as an innovator in radio spectrum management. While at Motorola in the 1970s, Cooper conceived the first handheld mobile phone (distinct from the car phone) in 1973 and led the team that developed it and brought it to market in 1983. He is considered the “father of the cell phone~ and is also cited as the first person in history to make a handheld cellular phone call in public Cooper is co-founder of numerous communications companies with his wife and business partner Arlene Harris; also known as the “first lady of wireless." He is co-founder and current Chairman of Dyna LLC, in Del Mar, California. Cooper also sits on committees supporting the U.S. Federal Communications Commission and the United States Department of Commerce. 21. Cooper had 11 patents in which of the following fields? A. Radio spectrum management B. Wireless communications C. Engineering D. Business 22. When was the first handheld phone brought to market? A.In 1983 B. In 1970s C.n 1973 D. In 1928 23. The underlined word “it” in the passage refers to . A-theteam —_B. the firsthandheld mobile phone C. Cooper_D. Motorola 24. Cooper is considered as ‘A the father of American engineering _B. the first lady of wireless C. the father of the cell phone D. the first man of wireless

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