A satellite is orbiting the Earth. What force keeps it in orbit? A. Frictional force B. Magnetic force C. Gravitational force D. Nuclear force 相关知识点: 试题来源: 解析 C。解析:卫星绕地球运行是因为地球对卫星的万有引力提供了向心力,使其能够在轨道上运行。A选项,太空中卫星几乎不受摩擦力;...
6 A spy satellite orbiting (沿轨道运行) 400 km above Earth is ___ capable of counting individual people in a crowd.相关知识点: 试题来源: 解析 highly 间谍卫星在距离地球400公里的轨道上运行,能够在人群中识别个体,这说明它拥有极高的分辨率。因此,填入形容词“highly”来描述卫星的这种能力,表示它“高...
Today, whether a satellite orbiting Earth or a smartphone in your pocket, all of these devices boil down to changing light into numbers representing the brightness of the sky at each pixel (像素). Some stars in the sky slightly change their brightness over time. With digital technology, the ...
B) It is altering the way of shopping.C) It can improve shopping efficiency.D) It appeals more to younger people.Questions 12 to 15 are based on the conversation you have just heard.12.A) He wanted the furniture store to give him a refund.B) He had a problem with the furniture ...
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4.According to the professor,what is the significance of having a satellite in orbit about 36,000 kilometers above Earth's surface? A. This is the physical limit of the length that a carbon nanotube cable could reach. B. A satellite orbiting at this height can remain directly above on ...
While ___the sun,the satellite has sent more than four billion bits of information back to the earth.A:having orbited B:being orbited C:having been orbited D:orbiting 【求详解,很难】
Polar orbiting satellite service means a service which is based on ___which relay distress alerts form satellite EPIRB and which provides their position. A. geostationary satellite B. near-polar orbiting satellite C. polar orbit D. terrestrial satellite 相关...
David FrancisForeign Policy