题干
—You all like your English teacher?
—Yeah, she devotes herself____ to teaching and it earns her a good reputation．
—Yeah, she devotes herself____ to teaching and it earns her a good reputation．
A：originally
B：extremely
C：obviously
D：entirely
答案(点此获取答案解析）
A
，若
存在零点，则实数
的取值范围是( )
