中国大学MOOC: ______ and ______ are the two moons of Mars.
中国大学MOOC: ______ and ______ are the two moons of Mars.
The earth is big. The moon is small. About 50 moons equal to one earth. </p></p>
The earth is big. The moon is small. About 50 moons equal to one earth. </p></p>
______ 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
______ 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
Since the launching of the first artificial ________ in 1957, thousands of “man-made moons” have been rocketed into(飞速进入) the Earth’s orbit.
Since the launching of the first artificial ________ in 1957, thousands of “man-made moons” have been rocketed into(飞速进入) the Earth’s orbit.
According to the passage, what is the effect of Jupiter's other large moons on Europa（） A: They prevent Europa's subsurface waters from freezing B: They prevent tides that could damage Europa's surface C: They produce the very hard layer of ice that characterizes Europa D: They assure that the gravitational pull on Europa is maintained ar a steady level
According to the passage, what is the effect of Jupiter's other large moons on Europa（） A: They prevent Europa's subsurface waters from freezing B: They prevent tides that could damage Europa's surface C: They produce the very hard layer of ice that characterizes Europa D: They assure that the gravitational pull on Europa is maintained ar a steady level