题干
In the third paragraph, the writer said he was lucky because__________.
A：he had a potential to live
B：he made good adjustment
C：his parents and teachers helped him a lot
D：he could fight to live with his blindness
答案(点此获取答案解析）
C
正确的是( )
上的奇函数
满足
，则
的值为（ ）
