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Man has done much research in our universe. Man has even invented four kinds of satellites. The first kind of satellite studies the geography of 1 , our home. It is used to make maps and also help countries to see where they may 2 oil and gold. The second kind of satellite is used to guide ships and planes. A ship or a plane can 3 a message to the satellite, and can find out where it is. The third kind studies the weather. These satellites watch clouds and strong wind 4 across the earth. They warn countries to be ready when the 5 weather is coming. They 6 of the earth from thousands of miles above it and send the photos to weather stations on the ground. 7 kind is used for communication. Telephone calls 8 countries can be sent by these satellites. Some can carry hundreds of calls at one time. A call is sent to the satellite, then the 9 sends it to a station in the country. These satellites also carry pictures. They can 10 and send about eight pictures at a time. People can send pictures to each other by mobile phones. |
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