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【单选题】

2015 年 9 月,紫金山天文台将其发现的编号为 199947 的小行星命名为( )

A.
准噶尔星
B.
塔里木星
C.
柴达木星
D.
喜马拉雅星
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参考答案:
参考解析:
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举一反三

【单选题】Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists. Asteroids are bigger versions of the meteoroids (流星) that...

A.
It is very unlikely, but the danger exists.,
B.
Such a collision might occur once every 25 years.
C.
Collisions of smaller asteroids with Earth occur more often than expected.
D.
It’s still too early to say whether such a collision might occur.

【简答题】下列小行星描述正确的是( )

A.
小行星带的质量都集中少数较大的球状小行星上
B.
小行星的直径越大,颗数越少
C.
小行星都集中在土星和木星轨道之间
D.
现代小行星的探测多采用天体照相术

【单选题】Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists. Asteroids are bigger versions of the meteoroids (流星) that...

A.
They are heavenly bodies different in composition.
B.
They are heavenly bodies similar in nature.
C.
There are more asteroids than meteoroids.
D.
Asteroids are more mysterious than meteoroids.