The planet ___ in its orbit. A. travels B. traveled C. is traveling D. will travel 相关知识点: 试题来源: 解析 A。描述行星在轨道上运行是客观事实,用一般现在时 travels。traveled 是过去式,不符合。is traveling 是现在进行时,不是正在进行的动作。will travel 是将来时,也不合适。
322 days.⑤What is the average temperature on 答案 答案见上 结果二 题目 ars is a planet(行星)and is the 4thMars's orbit(轨道)around the Sun is the 4thclosest planet to the Sun. The distancefastest orbit of all the solar system planets. Mars is red距离)from the Sun to Mars is over...
For those who did not watch the preceding video, Ferrada calls it aComet-Planetbecause it has the size of a planet, and the speed and elliptical orbit of a comet. Whether you believe or not what this video portrays is not essential. What matters is that there have been numerous prognostic...
Question: Use the fact that the orbit of a planet about the Sun is an ellipse, with the Sun at one focus. The aphelion of aplanet is its greatest distance from the Sun, and the perihelion is its shortest distance. The mean distance of ...
44.A planet of mass m orbiting a star of mass M at speed v.The orbit is circular with radius R.What would the planet’s velocity be if it orbited at a radius of 2R?(A)\5v/2(B)\5v/(√2)(C)\5v(D)\5v(E)\52v这题为什么不能用 a=V2/R,a不变所以V=√2 V来做?61.\5 ...
The eccentricity of a planet's orbit is measured on a scale from 0 to 1, with 0 being a perfectly circlular orbit and 1 being highly elliptical. Dwarf planet Pluto's highly elliptical orbit around the sun has an eccentricity of 0.25, for context, while the Earth's near perfectly ...
The planet moves around the sun in a(n) ___ orbit. A. circle B. oval C. spherical D. cubic 相关知识点: 试题来源: 解析 B。本题考查形容词辨析。行星围绕太阳在椭圆轨道上运行。选项 A“circle”圆形;选项 C“spherical”球形的;选项 D“cubic”立方体的,不符合行星轨道的形状。
Greenhouse gas (GHG)1 is widely recognized as the primary causeofclimate change, which may result from natural factors (e.g. changes in sun’s intensity or slow changesin theEarth’sorbitaroundthe sun),natural processes within the climate ...
A. The speed of the planet. B. The size of the planet. C. The gravitational force between the sun and the planet. D. The color of the planet. 相关知识点: 试题来源: 解析 C。解析:太阳和行星之间的引力使行星保持在其轨道上。A 速度不是决定轨道的主要因素;B 行星大小无关;D 行星颜色更与...
to orbit(orbit) our planet was just 2 years old.Her name was Laika.She was a good dog.Her 1957 flight paved the way for space(2) exploration(explore)when scientists wondered (3) whether/if it was lethal (致命的)for living things. Humans are born explorers.Since ...