题干
There is a picture __________ the wall. And there are two windows __________ the wall.
A：in; in
B：on; on
C：on; in
D：in; on
答案(点此获取答案解析）
C
There is a picture __________ the wall. And there are two windows __________ the wall.
A：in; in
B：on; on
C：on; in
D：in; on
的定义域是一切实数,则m的取值范围是（ ）