题干
It took me quite a long time to get to the school. It was _______ journey.
A：three hour
B：a three-hours
C：a three-hour
D：three hours
答案(点此获取答案解析）
C
It took me quite a long time to get to the school. It was _______ journey.
A：three hour
B：a three-hours
C：a three-hour
D：three hours
时，配方结果正确的是（ ）.
，若数列
满足
，
( ).