根据短文第三段中The earliest navigation system is the Global (全球的) Positioning System(GPS)of the United States. Russia's GLONASS and European Union's Galileo can also work globally.可知,这里提到了GPS、 GLONASS和Galileo三个;再加上中国的BDS,一共是四个,故答案是C。
百度试题 结果1 题目C)64. How many things can the satellite do in the passage? A.4. B. 5. C.6 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
As a result, much of Earth passes under a satellite in a polar orbit. Because polar orbits achieve excellent coverage of the planet, they are often used for satellites that do mapping and photography. And weather forecasters rely on a worldwide network of polar satellites, which covers the ...
as part of the Gravity Recovery and Climate Experiment. As they moved in the same polar orbit, the distance between them was monitored to an accuracy of 10 micrometres, a tenth of the width of a human hair. When either satellite flew over an area of increased gravity,...
As a result, much of Earth passes under a satellite in a polar orbit. Because polar orbits achieve excellent coverage of the planet, they are often used for satellites that do mapping and photography. And weather forecasters rely on a worldwide network of polar satellites, which covers the ...
Many of our TV programs come to US through satellites. Airplane pilots also sometimes use a satellite to help them find their exact location. We use satellites to send television pictures from one part of the world to another. They are usually 35,880 kilometers above the equator. Sometimes ...
Do you know how the word "satellite" got the meaning "armed guard"?Here is a (1)___ about it. The word was first used(2)___ ancient Rome.Rome,(3)___ you know,was the capital of the Roman Empire and the(4)___ of Western civilization(西方文明)for about a thousand years.But ...
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The U.S. Geological Survey (USGS) produced its first topographic map in 1879, and it still produces them today. Developments in aerial photography and satellite imaging make these maps much more accurate and efficient to produce than in the days when they were created by hand. When the ...
For example, the information for weather forecasts is sent by satellite. Some satellites have cameras which take photographs of the Earth to show how clouds are moving. Satellites are also used to connect our international phone calls. [translate] ...