—Let's have a party this Sunday. —_______. We'll have a good time.
A:You're right
B:That sounds great
C:That's for sure
D:Come on
夏天吹电风扇人感到凉爽,达是因为( )
已知定义在实数集R上的函数fx满足f1=1,且fx的导数fx在R上恒有fx<12x∈R,则不等式fx2<x22+12的解集是( )