题干
10 years ago， _________ only one classroom building in our school. And in 10 years， _________ five classroom buildings in our school.
A：there will be, there are
B：there was, there will be
C：there will be; there was
D：there was, there are
答案(点此获取答案解析）
B
和
的图象的对称中心完全相同，若
，则
的取值范围是 （ ）
