题干
____ is known, John studies in ____ is considered the best school in the city.
A：Which; which
B：What; what
C：It; which
D：As; what
答案(点此获取答案解析）
D
A：Which; which
B：What; what
C：It; which
D：As; what
在
上是减函数，则
的取值范围是 （ ）