A double star is a star that（）.
A: has a declination equal to twice that of the Sun
B: comprises two stars that appear close together
C: is twice as bright as a single star
D: suddenly becomes much brighter and then fade
A: has a declination equal to twice that of the Sun
B: comprises two stars that appear close together
C: is twice as bright as a single star
D: suddenly becomes much brighter and then fade
举一反三
- We produced ______ we did two years ago. A: double as much cotton as this year B: twice as much cotton this year as C: this year twice cotton as much as D: twice as this year much cotton as
- This book costs ______ that one. A: twice more B: twice more as C: two times more as D: twice as much as
- A bright new star ________ （突然出现）the screen of Hollywood movies.
- Ziwei Star is also known as ___________________.: the North Star|the Purple Star
- North Star is also known as the Ziwei Star and it is the leading star of the Ziwei Enclosure.