题干
Luo Juan will get _______ if we ask her to sing.
A：embarrassing
B：exhausted
C：convincing
D：embarrassed
答案(点此获取答案解析）
D
Luo Juan will get _______ if we ask her to sing.
A：embarrassing
B：exhausted
C：convincing
D：embarrassed
是偶函数，则常数
的取值范围是( )