百度试题 结果1 题目So far, how long will it take us from the Earth to Mars by spaceship?Two or three days.A few months.A few daysA few years. 相关知识点: 试题来源: 解析 最佳答案B 反馈 收藏
(1) It will take about 250 days to get to Mars and about 250 days to come back from Mars. (2) It is about 384,400 kilometers from Earth to the moon. (1) 到达火星并返回地球所需的时间取决于地球和火星之间的距离,该距离会随着两颗行星在太阳系中的位置而变化。平均而言,往返火星需要约500...
--是的,乘宇宙飞船去火星旅行需要好几个月. 解答 答案:B.How soon多久以后;How far多远; How long多久; How often多久一次.根据答语中it takes months to travel to Mars by spacecraft.可知这里应该表示的是多远.故选B. 点评 本题考查了how引导的疑问词组.解答时注意区分和辨别.练习册系列答案 ...
解答 答案:C根据回答"It takes months,I think"可知,此处是在询问时间段.A how far 询问距离;B how often询问频率;C how long询问时间段;D how soon 询问多久以后.只有C符合语境,故答案为C 点评 做这道题时要根据回答判断出询问的是什么,并从选项中选出最合适的选项.练习...
Mars opposition occurs when Earth "catches up" to Mars and is positioned between the sun and the Red Planet. During Mars oppositions, from Earth, we can see Mars rise in the east as the sun sets in the west, with the Red Planet being visible in our skies all night long. Such opposit...
How long does it take to get to Mars & what affects the travel time? The time it takes to get from one celestial body to another depends largely on the energy that one is willing to expend. Here "energy" refers to the effort put in by the launch vehicle and the sum of the maneuver...
of each planet from the Sun. Earth is situated much closer to the Sun as compared to the planet of Mars, giving it a shorter distance to cover. On the other hand, since Mars has to travel a long distance to complete a single orbit, it can take some time to align with Earth. ...
or so, Mars and Earth reach their closest point, called “opposition”, when Mars can be as close as 55,000,000 km from Earth. And every two years, space agencies take advantage of this orbital alignment to send spacecraft to the Red Planet. How long does it take to get to Mars?
It might raise the risk of health problems, especially for astronauts who will have long journeys. Scientists are working out the problems.They have found taking certain vitamins(维生素) can help.Astronauts will have to pack light to lift off from the earth.But they won't be able to get ...
Coming out to families of origin is a pivotal event that changes the family system. Race, ethnicity, and immigration intersect with a family member's disclosure of sexuality and gender identity. Families are both private and public institutions, and are influenced by, and influence, the media. ...