[听力原文] 14-17 Some people say radio was invented by Guglielmo Marconi of Italy. Marconi sent the first radio communication signals through the air in eighteen ninety-five15. In fact, no one person can be called the inventor of radio. Many people, including several Americans, helped to de...
Some people say radio was invented by Guglielmo (Gu-Lee-YER-Mo) Marconi of Italy. Marconi sent the first radio communication signals through the air in eighteen ninety-five. In fact, no one person can be called the inventor of radio. Many people, including several Americans, helped to devel...
Some people say radio was invented by Guglielmo [gu-lee-YER-mo) Marconi of Italy. Marconi sent the first radio communication signals through the air in eighteen ninety-five. In fact, no one person can be called the inventor of radio. Many...
1923:Sent shortwave signals over distance of 2,250 km (1,400 miles) 1930:Chosen as president of the Royal Italian Academy 1937:Died inRome(July 20) In 1894 Marconi began experimenting at his father’s estate near Bologna, using comparatively crude apparatuses: aninduction coilfor increasing vol...
Radio broadcasting is a way of sending out sound signals using radio waves. It was invented over 120 years ago and is still used today (well, you must know that… you listen to Fun Kids!). Radio waves are a type of energy that can travel through the air and carry sound with them. ...
In 1895, a young Italian named Guglielmo Marconi invented the first radio and sent a message over one kilometre away. In 1897, he started a company and developed several uses for radio. A radio broadcast works by changing sounds or signals (号) into radio waves, and then the radio ...
Some people say radio was invented by Guglielmo Marconi of Italy. Marconi sent the first radio communication signals through the air in eighteen ninety-five. In fact, no one person can be called the inventor of radio. Many people, including several Americans, helped to develop radio. You may...
1. What was Guglielmo Marconi interested in? (No more than 4 words)2. How far could Guglielmo Marconi send wireless signals in 1895? (No more than 5 words)3. Translate the underlined sentence in the second paragraph into Chinese.4. Fill in the blanks in Paragraphs 1,2 and 4 with ...
The modulated carrier is also amplified, then applied to an antenna that converts the electrical signals to electromagnetic waves for radiation into space. Such waves radiate at the speed of light and are transmitted not only by line of sight but also by deflection from the ionosphere. Receiving...
A1: Tesla, Marconi, and Popov (possibly in that order) Q2: Who invented amplitude-modulated (AM) radio, so that more than one station can send signals (as opposed to spark-gap radio, where one transmitter covers the entire bandwidth of spectra)? A2: Reginald Fessenden [4] and Lee de...