题干
Be careful of the dog! It's _______. Keep away from it.
A：gentle
B：aggressive
C：lovely
D：interesting
答案(点此获取答案解析）
B
Be careful of the dog! It's _______. Keep away from it.
A：gentle
B：aggressive
C：lovely
D：interesting
若
是奇函数，则
的值是（ ）