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【单选题】In many stories on TV and in science-fiction books, men travel to faraway stars．They have quick, easy journeys．But so far, men have been able to reach only the earth's own moon. Suppose a man wanted t...
A.
Units of light-years sound better.
B.
Using light-years reduced the number of figures used.
C.
We used to measure distance in light-years long ago.
D.
We do not make mistakes when we use light-years.
相关题目：
【判断题】北斗星就是北极星。
A.
正确
B.
错误
【单选题】我国所称的“北斗星”是下列星座中的______?
A.
小熊星座
B.
大熊星座
C.
天狼星
D.
织女星
【单选题】《史记》中记载北斗星的柄是对着()的头。
A.
白虎
B.
朱雀
C.
苍龙
D.
玄武
【单选题】In many stories on TV and in science-fiction books, men travel to faraway stars．They have quick, easy journeys．But so far, men have been able to reach only the earth's own moon. Suppose a man wanted t...
A.
Units of light-years sound better.
B.
Using light-years reduced the number of figures used.
C.
We used to measure distance in light-years long ago.
D.
We do not make mistakes when we use light-years.
【单选题】《史记》中记载北斗星的柄是对着（）的头。
A.
白虎
B.
朱雀
C.
苍龙
D.
玄武