题干
Joan is the most modest of us, and she never ________.
A：works out
B：comes true
C：puts up
D：shows off
答案(点此获取答案解析）
D
Joan is the most modest of us, and she never ________.
A：works out
B：comes true
C：puts up
D：shows off
是定义在
上的奇函数，且
是偶函数，当
时，
，则
=【 】
