下载APP
【判断题】
嫦娥二号卫星,是中国第二颗探月卫星、第二颗人造太阳系小行星,是中国第一颗探月卫星嫦娥一号卫星的备份星。
A.
正确
B.
错误
参考答案：
参考解析：
刷刷题刷刷变学霸
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.