The exploration of Mars has attracted a lot of attention. What is the atmosphere of Mars mainly composed of? A. Oxygen and nitrogen B. Carbon dioxide C. Hydrogen and helium D. Methane 相关知识点: 试题来源: 解析 B。火星的大气层主要由二氧化碳组成。选项 A 氧气和氮气不是火星大气层主要成...
(B)By the year 2100, we will live on Mars.Here is what life will be like.First of all, it will be easier for us to go out.Now our spaceships (太空飞船) are too slow to take large numbers of people to Mars. However,by 2100, it will take us two or three days to get to Mar...
Located between Earth and the asteroid belt Mars is also the second smallest planet. Features on the surface indicate that at sometime in the past Mars may have had liquid water on the surface.Answer and Explanation: Mars formed around the same time as the rest of the planets, about 4.5 b...
1What is the main goal of sending human missions to Mars A.To find out if life ever existed there.B.To see if humans could survive there.C.To prove the feasibility of large-scale space ventures.D.To show the leading role of science in space exploration. 2What is the main goal of se...
Many people believe that by the year 2100 we will live on the planet Mars(火星). Here is what life could be like. First of all transport should be much better . By 2100 spaceships can travel at half the speed of light. 1.___
a. the orbiter b. space station c. the lander d. Mars rover A. abc B. acd C. abd D. bcd 相关知识点: 试题来源: 解析 B 细节理解题,根据第三段China's Mars probe has three parts --- the orbiter(环绕器), the lander(着陆器)and the rover(火星车)可知答案选B。
A. Mars is as big as the Earth in size. B. Mars is the fourth planet from the Earth. C. The surface of Mars is similar to that of the Earth. D. Mars is one of the planets whose surfaces can...
[题目]Many people believe that, by the year 2100, we will live on the planet Mars. Here is what life could be like.First of all, transport should be much better . By 2100, spaceships can travel at half the speed of light. [1] .Secondly , h
Many people believe that by the year 2100 we will live on the planet Mars(火星). Here is what life could be like. First of all transport should be much better . By 2100 spaceships can travel at half the speed of light. 1.___. Secondly humans need food water and air to live. Scie...
Mars:Mars is the fourth planet from the sun, known as the red planet. This planetary neighbor to Earth has rugged terrain that is decorated with various canyons, valleys, and volcanoes.Answer and Explanation: Valles Marineris is the largest canyon on Mars, as well as the largest canyon ...