题干
The second-hand car Tom bought was very cheap. ______ it was in excellent condition.
A：Eve
B：Although
C：Beside
D：While
答案(点此获取答案解析）
C
A：Eve
B：Although
C：Beside
D：While
是奇函数，当 
时， 
，当 
时， 
的最小值为1，则a的值等于（ ）