题干
____ today， he would get there by Sunday.
A：Would he leave
B：Was he leaving
C：Were he to leave
D：If he leave
答案(点此获取答案解析）
C
时，
恒成立（
为函数g(x)的导函数）；②对任意x∈R都有g(x)=g(-x)。又函数f(x)满足：对任意的x∈R都有f(
+x)=
成立，当x∈
,
时，f(x)=
。若关于x的不等式
)对 x∈-
-2
