——How do you fee1 about the new film?—— I don't like the end.
A:All of a sudden
B:To be honest
C:After all
D:In this way
最先证明地球是个球体的事件是( )
已知A、B、C为△ABC的内角,tanA、tanB是关于方程x2+3px-p+1=0(p∈R)两个实根.