中国大学MOOC: ______ and ______ are the two moons of Mars.
举一反三
- ______ and ______ are the two moons of Mars. A: Mercury , Venus B: Asaph ,Hall C: Phobos , Deimos D: Romeo, Juliet
- ______ and ______ are the two moons of Mars. A: Mercury , Venus B: Asaph ,Hall C: Phobos , Deimos D: Romeo, Juliet
- 中国大学MOOC: The _______ is the outermost layer of Mars.
- 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
- Will Mars become the new _____ ( 住处 ) of human beings? It seems many people are fascinated by the idea of settlement on Mars.