Which concept is not about the Smart Earth? A: digital earth B: internet of things C: cloud computing D: Mars exploration

Why is the second theory sometimes referred to as the Mars Theory A: Earth's moon used to orbit Mars. B: Mars was captured by the gravitational field of the Sun, C: A planet the size of Mars collided with Earth. D: Mars is larger than Eart

中国大学MOOC: Which of the following places on Earth makes a bad Mars analog?

If a person weighs 68kg on Earth, about how heavy would he or she feel on Mars?

All the planets in solar system EXCEPT ______ got their names from Greeo-Roman mythology. ( ) A: Earth B: Mars C: Jupiter D: Pluto

‌Which of the following places on Earth makes a bad Mars analog?‍ A: The Arctic B: Antarctica C: Mojave Desert D: Amazon Rainforest

Which of the following places on Earth makes a bad Mars analog? A: The Arctic B: Antarctica C: Mojave Desert D: Amazon Rainforest

One speculation for wearing the wedding ring on the fourth finger is that the ring finger of the left hand was associated with ________. A: the Sun B: the Moon C: the Earth D: Mars

Some scientists think there may have been life on the Mars in the past because （） A: there is no life there now B: there is a large amount of water at the poles C: the Mars may be able to support life in the future D: conditions may have been similar to those on the Earth

The solar system in astronomy consists of the sun and its planets. EXCEPT （）, all the planets got their names from Greco-Roman mythology. A: Mars B: Earth C: Venus D: Jupiter