下载APP
【简答题】
我国有首童谣唱到：“太阳大，地球小，太阳带着地球跑；地球大，月球小，地球带着月球跑。”据此，回答问题。 小题1:童谣中描述的天体，按照先后顺序分类正确的是 A．恒星、行星、卫星 B．星云、恒星、行星 C．恒星、行星、小行星 D．恒星、小行星、流星体 小题2:童谣中出现的天体不属于 A．太阳系 B．银河系 C．河外星系 D．总星系
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Isn’t it surprising that scientists have a better understanding of how many stars there are in the galaxy (银河系) than how many species there are on Earth Their estimates of global species diversity var...
A.
The soil and the deep sea belong to communities that haven’t been fully explored.
B.
It is surprising news wherever new species are discovered in the deep sea.
C.
About 90 million species are believed to live in the deep sea.
D.
A million species in the deep sea have been discovered and named.
【单选题】根据文意，天体物理学家发现的银河系“甘戈特里波”是一种（）。
A.
冰川一样的结构
B.
像“羽毛”一样的气体卷须
C.
连接银河系两条旋臂的固体星系结构
D.
冷一氧化碳气体云
【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.
【单选题】2011年7月，天文学家发现了一颗直径300米的小行星，它与地球有着相同的公转轨道，并始终在地球前方“打转”。这一发现再次印证了( ) ①自然界是物质的 ②人的意识是物质世界的产物 ③人类社会是物质的 ④世界真正的统一性在于它的物质性
A.
①②
B.
③④
C.
②③
D.
①④