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【单选题】

火星有几颗天然卫星?

A.
2颗
B.
3颗
题目标签:火星天然卫星
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参考答案:
参考解析:
.
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【单选题】At the first sight the planet Mars(火星)does not appear very welcome to any kind of life.It has very little oxygen and water, the temperature at night is below -50°C and winds of 100 miles per hour caus...

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

【单选题】木炭火星属于()。

A.
无焰燃烧放热
B.
低温物体
C.
有焰燃烧放热
D.
载热体放热

【多选题】火星属于( )

A.
地内行星
B.
类地行星
C.
地外行星
D.
类木行星